I think this is right. I always thought of him (when I thought of him at all) as a mostly apolitical self-help guy, then I noticed that he'd become a kind of villain for the left so I looked into it and he really does seem to have gone off the rails at some point.

There's some kind of radicalizing feedback cycle at work with guys like Peterson --to name only one prominent example-- and I'm not sure that it's simply that they were always assholes to begin with. You see a similar dynamic with Elon Musk; it's almost like they take personal offense at any criticism and instead of thinking about it, they just double down.