It absolutely is, although I'm not even talking about communism specifically. I'm basically a socdem and a leftist (as far as actual, normal society goes - less so for Lemmy, obviously), though that's completely irrelevant. It's all about... just shitty behavior, false flagging, wannabe-authoritarian, bad-faith, trolling, dishonest bullshit. Question communities like this and asklemmy are chock-full of thinly veiled soapboxing and questions loaded more heavily than a thousand cargo ships. Even if you agree with the basic points, it's fucking obnoxious. Not only that, it's bloody stupid and a prime example of shooting oneself in the foot, at least if the idea was ever that more than about forty people would use this thing.

Reddit was full of subs where the (often right-wing or particularly right-wing tolerant but not exclusively) twats-in-charge banned you from subs or the site at the drop of a hat. This was a major selling point for the fediverse - why if that happens on the fediverse, it's Decentralized so you'd just blahdiblahdiblah. In reality, though, several communities - the only active ones in many cases - are apparently sticking around on instances where the only difference from r/conservative or whatever is the paintjob on aforementioned twat-in-charge and their views. If they're not condoning "power" abuse, trolling and spam from even more blatantly bad-faith instances, they certainly aren't doing anything to mitigate it. That doesn't really look dramatically better as far as fairness and tolerance go.