folks out there, who do these things performatively especially online to gain some social points or something

I actually think that you thinking this is a problem, is a large part of the problem. People refuse to recognize that other people might just have higher or different standards than them, and think it must be in bad faith. This leads to people who generally agree being fizzled out by all the other people they feel are speaking in bad faith (and there are many that are trying to support non leftist opinions tbf), and leads to leftists ending up being unable to realize that they are allies even if they don’t perfectly align. TBF its kinda hard to see someone shitting on you (as they think you’re a baddie with the fizzled out feather light triggers), but we kinda have to try to figure out how to do that, because otherwise, being a shitty human being is just a winning formula when they have a much easier time forming alliances because they can base their entire identities around hating some people for no good reason.