I would really just like the quirkier internet of old.
Flamewars these days are just created by shit-stirrers in another country who are just pumping out rage bait from an massive array of smartphones. It's not even an impassioned flamewar, it simply exists to aggravate.
Using AI to forcefully disengage by simply suppressing that content would be nice and also have the secondary effect of depriving various internet resources of ad revenue.
I'd argue the issue is people have figued out that "shit stirring" can make actual meaningful differences to reality, be they foreign or local.
When the limit of effect a flamewar would have is if Star Trek or Star Wars got the top billing, or Vim was recommended to new programmers instead of Emacs, it was a fun novelty.
But now there's real money and power resulting from this shit stirring of course people will use it as a means to an ends. They've optimised professional shit-stirring because it's so valuable now.