Why does every cafe around me have acidic espresso?

Same, all of those third wave specialty hypetrain shops serve unpalatable crap. It's acceptable in a dairy drink as they mellow down the flavors, but that's not what I think "special" should imply.

You know where you get a decent espresso? Some Italian ice cream parlor. And they didn't inflate the prices as much either, since it's not their core product.

lol my favorite espresso spot in my area is a gelato bar
I did find a good shop in an Italian bakery. That's a good tip. The one I visited today though was all up their own ass about roasting their own beans and doing off the equipment but I'm the end it was terrible
- Yeah I had the same experience a couple times. The more snobbish they are, the worse it tastes. Bloody hipsters.
....who didn't? The hypothetical ice cream shop?
- Yep. Can't speak for all of them of course, but the ones around me increased the price of an ice cream scoop from 50 cents to over 2 bucks, but the espresso didn't even go up 20% in the same time.

Hard disagree. What I can't stand is burnt coffee, and lighter roasts provide more acidity and IMHO more complexity than just "burnt."

I'm the reason all your coffee is acidic! Mwahahaha! It's all me!

Acidity might have its place in an Americano or dairy drink, where it's diluted down. But in an espresso shot, or worse yet, a ristretto? Hard pass. If I want to put something in my mouth that shrivels my intestines and makes my butthole pucker up, I might as well munch on a lemon. Fully on board with @CodingCarpenter@lemm.ee here.
- I get more flavor from lighter roasts and higher acidity. It tastes like coffee. Darker roasts, all I taste is burnt, bitter coffee.
  
  What do you think of Starbucks coffee?
there's a difference between "light roast acidity" and "horribly under extracted lemon juice acidity"
- Right? There's a reason that 'espresso romano' is a separate thing
How dare you! Seriously though I'm all for acidity it is needed for good coffee. But it should not hurt my mouth or throat lol. Espresso doesn't need to be burnt, I think it just tastes that way sometimes because people lean toward dark roasts as they are so much easier to brew.
- I don't think I've ever tasted coffee that acidic, although once I roasted just barely past the first crack and it was a bit sour. I thought it wasn't bad, TBH; I got a lot more flavor variety out of it, but usually I go a bit farther and try to hit second crack during cooldown. I stopped the roast on my current batch at the second crack, and it's far darker than I prefer. At that point all I taste is bitter and smoke.
  
  Maybe the difference is that I don't generally drink espresso; I use my Elektra to make cappuccinos, and then I'm not doing that, I drink cold brew. Bitterness overwhelms all other flavors for me, so I do everything I can to avoid it.

Probably they're more focused on their milk drinks. The milk really fills the acid, making the whole thing nicely tangy. Not really an excuse tho - if they have espresso on the menu it should be good.

EDIT: "dulls" not fills.

I’m a roaster. Part of it is that people put so much importance into making coffee with freshly roasted beans. when you roast beans they give off co2. Ideally you want to let the beans sit for a day or 2 to degas. It’s the same reason seltzer water has an acidic taste, it’s full of co2

That's part of it. The other part, however, is more neglect than anything else. They dial in their grinder for the first batch, and that's it. Never again. That's fine for that batch and, sometimes the next, but it starts losing calibration after a while. Add that to the fact that each batch needs to be dialed in for pique flavor, and you get crappy, often times acidic or sour, pulls.
- It also helps to dial in the espresso machine which a lot of places never do or they have a machine that is fully automatic

My town too OP. All the trendy roasters like the fruity floral notes of the light roasts but i can't its like drinking stomach bile.

I guess it's like my mother said before she shot my father: if you want it done right, do it yourself!

I only know of three places in my larger metropolitan area that care about how the espresso tastes. The rest are all just serving milk-based drinks.

This might be a big part of the problem. If people are only ordering things like lattes then I can absolutely see that happening

Are You adding milk, a few shots of syrup, some cocoa powder and a whip cream topping? Most Americans find this cuts down on the acid and the shops are likely catering primarily to them. Also, machines that are not kept clean can build an acidic taste. Ask them if they have an espresso with some robusta blend. I prefer these over pure aribica espressos as they have a more well rounded, less acidic profile.

Yep. Great little French (style) bakery/cafe near me can’t come close to pulling a decent shot. WHY??

The two lessons I remember about traveling to France is their coffee tastes like shit and their wine is fantastic.

If all the coffee shops in your area serve unbearably sour espresso, there might be 2 possibilities: either all of them suck and can't properly extract a light roast, or you might be hypersensitive to acidity. Personally, I love acidity and I enjoy fruity, pleasantly acidic espresso as much as sweet, chocolatey shots, but I get that for a lot of people, "coffee" tastes burnt and bitter.

Coffee is naturally acidic. Very acidic. Acid compounds are also among the fastest to extract. The lighter the roast, the harder it is to extract most of the coffee, therefore light roasts tend to be more acidic than more heavily roasted beans. Light roasts are all the rage ATM because they respect the beans' origin and characteristics and highlight rather than hide the specificity of high quality beans. The more you roast, the more you lose the original character of the beans and get burnt flavors (this is why most commercial coffee is heavily roasted, the more you burn it, the more you hide the flaws of you cheap, commodity shitty beans).

Espresso extraction follows a curve :

First drips: salty and very thick
under-extraction: sour and thick
sweet-spot: sweet, chocolaty and syrupy
over-extraction: bitter, watery.

Since roast levels affect the ease of extraction, the same ratio on a light roast and a dark roast will be wildly different. a 2:1 ratio for a light roast would be still way under-extracted, therefore a longer ratio should be used to get some sweetness to compensate for sourness, and get a slightly acidic shot (2.5:1 to 3:1 ratio should be fine). Dark roasts will overextract much quicker and get bitter much sooner, and therefore should be shorter to be palatable. A medium roast should be in the Goldilocks zone at a 2:1 or slightly longer ratio.

TL;DR: ask for a longer shot or a medium roast if you want less acidity and more sweetness and chocolatey flavors, a traditional dark roast blend with up to 20% robusta if you enjoy old school bitter espresso, or drown it in dairy, sugar and spices.

I prefer it that way; my wife is like you. Classic espresso with the darker roasted and more bitter profile is not pleasant to me, but my wife will say it's perfect; and what I like, she can't stand.

It's as if different taste palettes exist...

For almost ten years now I’ve been encountering lots of drip coffee with some kind of “rotten” flavor note to it.

It’s vaguely like hops in a way. A funky note, similar (experientially; I understand it doesn’t come from the same process or ingredients) to what a wheat beer has that other beers don’t.

Anyone else know what I’m referring to?

It’s the fermentation process. You’ll find it more in natural processed coffees or honey processed. Even more so with anaerobic fermentation or yeast based fermentation.

What you’re looking for is washed coffee, or commodity coffee with no mention of the processing. Or dark roasts, as the taste of heavily roasted coffee will negate a lot of the taste that is inherent to the bean and the processing. A bit like a well-done steak.
Rancid oils? Like a "break-room-at-11am"-flavor?
- Actually yes, I think rancid oil could be similar. Do coffee beans have oil in them?
  
  I’m not sure what you’re referring to with the break room thing, unless you’re referring to butter left out too long and gone rancid?

Find an Italian place. Or an old mom and pop shop. Or you can always lick some of the burnt tires that you find along the highway if you really miss the taste of that robusta shot. /s

To each their own. No need to crap on what other people like.