As with most social media, I think the voting system makes it worse. There is always an element of “playing to the audience,” in that the easiest way to get validation (votes, boosts, replies) is to make sure everyone thinks you’re morally or intellectually superior over the person you’re talking to, whereas an actual normal conversation would be focused on the exchange of new ideas and perspectives.
Stronger moderation could help, and filtering the less civil communities could help, but I suspect it’s just a natural consequence of having a built-in validation system that applies to every post and comment everywhere. As engagement in the fediverse grows overall, I could see it getting worse mainly because of more ‘vote-seeking’ behavior.
P2W games are like, “You got 2 free skips! Let’s try using one now on this 5-minute timer.” & You know I’m waiting the full 5 minutes because after the tutorial every cooldown is like 8+ hours.