Finding out that the author of Death Note's absolute dogshit way of writing women wasn't just the usual shonen author bullshit and fanservice but he's actually a big misgynist chud who writes women badly on purpose.
I just read Light as being unambiguously evil from the outset, even though it's pretty clear that wasn't the author's intent. Still found it pretty shocking to encounter people who don't see it like that.
I thought the point was to show Light is an evil asshole. I don't see how that is problematic, because it is supposed to be problematic, illegal and immoral.
I have more issues with how women are written, but hey, even Harley Quinn has similar issues..