I've been transitioning to Linux recently and have been forced to use github a lot when I hadn't much before. Here is my assessment.
Every github project is named something like dbutils, Jason's cool photo picker, or jibbly, and was forked from an abandoned project called EHT-sh (acronym meaning unknown) originally made by frederick lumberg, forked and owned by boops_snoops and actively maintained by Xxweeb-lord69xX.
There are either 3 lines of documentation and no releases page, or a 15 page long readme with weekly releases for the last 15 years and nothing in between. It is either for linux, windows, or both. If it's for windows, they will not specify what platforms it runs on. If it's for Linux, there's a 50% chance there are no releases and 2 lines of commands showing how to build it (which doesn't work on your distro), but don't worry because your distro has it prepackaged 1 version out of date and it magically appears on flatpak only after you've installed it by other means. Everything is written in python2. It is illegal to release anything for Mac OS on github.
If it's for Linux, there's a 50% chance there are no releases and 2 lines of commands showing how to build it (which doesn't work on your distro), but don't worry because your distro has it prepackaged 1 version out of date
There's a tool called Distrobox.
You can install it (via CLI I think?), and then manage it the easiest graphically way via BoxBuddy (available in your Software Center), or just the terminal if you prefer it.
With it, you can screw all those "Doesn't work on my distro" moments.
You're on Linux Mint? No problems, here's the AUR for you!
✨✨✨ BONUS: Your OS won't break anymore randomly due to some AUR incompatibility, because everything is containerized! ✨✨✨
Even if you run Arch, use it to install AUR stuff. Or Debian/ Ubuntu, add PPAs only via Distrobox.
It's absolutely no virtual machine. It basically only creates a small, lightweight container with all dependencies, but it runs on your host. Similar to Flatpaks.
You can also export the software, and then it's just like you would have installed it natively!
Your distro choice doesn't matter anymore. You now can run any software written only for Suse, an abandoned Debian version 10 years ago, Arch, Fedora, Void, whatever. It's all the same.
your distro has it prepackaged 1 version out of date
And the only reason you wanted to install the thing is because it's a prerequisite for some other thing you wanted to install, which requires the latest version.
I'm currently in the process of updating Slackware's documentation, some of which hasn't been touched in 12 years.
It's completely out of date, so no one uses it anymore.
And because no one uses it, no one updates it.
When I first moved to linux I felt this same way. It gets better. Now days I fucking love those 15 page ReadMes and I'm not bothered if there's no steps for my distro. The sheer volume of documentation surrounding linux packages is insane. There's often a ton of ways to configure and manage the to fit your needs. That freedom is what I love so much about linux.
As for the ones with 2 lines, I don't think I've seen that as much. I generally would avoid them unless the source was clear what the project did.
At any rate there will come a day when it starts to click. It's just a marathon not a sprint.
As someone who works fairly extensively with all three major platforms... You're definitely wrong about macOS here. Almost everything on GitHub that works on Linux also works on Mac, aside from GUI applications which are often more OS dependent. The readme pages often just lump Mac and Linux together as they can be pretty similar, especially for things written for interpreted languages (python) where it's often literally the same.
GitHub is a place you can use to easily put a copy of your code online. Many people just want to build a working solution and move on. Building a useful GitHub project, with fancy stuff like releases, is work that isn't really solving any issues. Many people don't like doing it. Many people especially don't want to invest time in proprietary solutions like GitHub. They might not even accept pull requests on GitHub.
What's your bubble of interests? I mean I've seen Github projects where that description fits very VERY well. Usually when I'm attending to some very niche hobbies. Or try to get some exotic electronics from 20 years ago running again... With the everyday tools it's most of the times some active community and I copy and paste the 3 commands and I have it installed successfully.
You get used to how to find the right way of doing stuff. If you're still in the Windows biased search results space, everything FOSS is made to look sketchy. Those search results are not deterministic. That bias is intentional. Eventually Microsoft stops biasing you or bribing Google to do the same and your search results will be better. Then you stop using the search results all together for the most part. You'll figure out that the ways you did things in the past were inefficient and usually wrong. There are better ways that you'll discover and those repos are self hosted or on gitlab or elsewhere. You eventually just use RPM fusion, or you setup distrobox with Arch and the AUR, or you toss on the Nix package manager and start using flakes. The vast majority of my initial headaches were due to trying to replicate Windows workflows. Then I learned all of that was weird and pretty backwards.
While I do see most of the listed stuff happened to me before, they only appear once in a while and it's often just one sentence in the list is true. I think OP is trying to make an exaggerating slander where it's extremely unlucky to have more than 5 sentences is right
Yeah you want to know the funny thing: I ended up on Github a lot when I was new to Linux, but that has happened less and less over time and I think it's due to two unrelated factors:
I have assimilated. As a Microsoft emigrant, I was used to doing things a certain way, there were things I didn't know about Linux, I hadn't really chosen the hardware I owned for Linux compatibility, etc. So I kept having to go get weird device drivers and weird little software packages to work on my distro and open my old files and such. But as I've gotten used to the ecosystem, replaced my old hardware with that which is Linux compatible out of the box etc. I've needed to do something weird less and less often.
Flatpak and Appimages have risen in popularity. It's easier to get the software you need, that runs on your distro, that is up to date and modern, even if it's not very popular. Because a variety of software is available in these formats it's easy to get what I need, be it commercial software, esoteric little stuff for my niche pastimes, etc.