In general anything that has "algorytmic content ordering" that pushes content triggering strong emotional reactions should be banned and burned to the ground.
People stating their perspectives and arguing against other's with complete disregard for civility (or being 'mean' as you said), makes it far more difficult for people to respect opposing viewpoints.
Of course, my solution was to stop using those services. But, I wouldn't be surprised if certain personality types are unable to do that (same as they can't quit smoking or porn or whatever else).
It's basically a dark entity that cranks up footbal hooligans and then push them on the collision course.
There is no civility there.
For such people everything must be framed in a good versus evil, us vs them or generally sensationalist manner to sustain any kind of attention.
There's mean content ("I think you are an asshole") and there's content that's going to cause actual harm because it either goads others to violence or because it creates a constant cortisol increase from fear and dehumanization.