All the mindless circlejerking and echochambers. I hope the federation helps split up communities about the same topic which should help prevent echochambers from being as strong, and keep people seeing more information and opinions about the same topic.
I was so tired of seeing blatant lies and misinformation being spread just because it fit people's narratives. Like those "dawn project" tesla videos, people hate musk so much (which I'm sure all the much worse billionaires love), so they feel they must hate teslas too, so they keep spreading those videos that have been debunked and proven incredibly questionable that were made by a competitor that's been failing to compete. That's just one tiny example. Don't even get me started on the outright lights and misinformation people spread about crypto.
And of course if anyone ever tried to correct anyone, share actual facts, real articles from trusted sources, anything that went against a particular thread's circlejerk, you would just be harassed, personally insulted, and downvoted immediately. It was so hilarious and sad spending time responding to someone's bullshit with real information and a real argument just for them to do a one-liner personal insult based on nothing, because they knew they didn't actually have anything but the circlejerk is all that really ever mattered.
I'm ranting, but this attitude people have of just not caring about reality when the lies fit what the circlejerking hivemind wants is one of my biggest gripes about modern internet and it's incredibly dangerous. It's exactly the mindset that trump supporters have that allows them to believe whatever the fuck they want and that led to people dying at the capitol, and it's the type of mindset that will eventually lead to far worse things if social media companies don't do more to combat misinformation and echochambers.