It seems like we agree on the facts, and I certainly won't disagree that it's worse now, but I would characterize Twitter's (pre-Musk) response to extremism as "measured, lacking and lethargic", before I would use "imperfect", which still implies "pretty good" and from my perceptive it was not good enough to make me want to use it. I think maybe we just have a different tolerance for hate speech.