I don't know what kind of places you moderate, but there plenty of factors involved, and a big one is the medium itself. Compare a chatroom or forum (incl imageboards) to reddit-like sites, and I'm sure you can already think of a few ways each pressures people to talk a different way - forum posts get more attention when they bumped with replies and that makes troll bait posts powerful. On Lemmy, those will get sunken to the bottom with downvotes and on Hexbear a troll doesn't even get the validation of downvotes. On the other hand, on these kind of sites, bland agreeable neutral posts tend to get the most upvotes/least downvotes, so the default front page will be contantly plastered with banal twitter platitudes and cute funny animal pictures.
These trends can and have been overcome, but it's tough without careful site design or an unusually disciplined userbase. (As in, won't respond to trolls)