My biggest issue is the unavoidable US centrism. Again, much better than what's out there, but it's absolutely real. Real talk gets stuck down immediately for being inflammatory
I've noticed that I have to shy away from certain ways of expression when I say things critical of a US-positive narrative. I have to avoid "real talk" as it were. It's kinda frustrating because that's how I prefer to speak but I can also see a difference in the discussion that ensues.
I feel you though. It can be pretty tough when you say something genuinely concerning, which people don't like thinking about, only to have it dismissed with the downvote button. Still, oftentimes such things gain more points while I'm sleeping and seemingly people in other parts of the world view my comments (which I think is kinda telling; it's what it is).
(For context, I am a born US citizen.)