I don't know if I know the solution, but I know one thing that isn't the solution: silencing everyone who disagrees with you. A lot of the people complaining about "toxicity" on the internet seem to be under the impression that if we "deplatform" the so-called toxic people, that will fix things. But on the contrary, that makes things worse. If someone says something awful on the internet, and everyone either ignores…
I spend the bulk of my time studying extremist discourse and communities. Extremist bigots take it as read that people of the wrong ethnic/religious/political group are either not people or at best inferior people, and direct their efforts to promoting those views, planning how to eliminate those they dislike, and normalizing that behavior.
You are, essentially, projecting the characteristics of bad actors onto other actors who are warning and complaining about said bad actors.
I've found that when I actually talk to so-called "toxic" people politely, they are willing to listen. It's not them that are causing the polarization.
That's a tactic known as 'entryism' designed to leverage your nice, conflict-averse personality as a vehicle for normalization and possible future recruitment.