Some of what he says is a bit disturbing, but he has a lot of statistics and cites a lot of sources that seem very credible, and I've yet to come across any counter-arguments that are anything more than incredulity and ideology. I'd love to see a plausible and knowledgeable counter argument.
Not everything he says is off base and he does present the basics of clinical psychology well. Cognitive Behavioral Therapy is an interesting field one can gain a lot from studying. However many things he talks or just hints at can be questional and neither his expertise nor fairly presented.
It helps his cause that many criticisms of him are terrible and involve many fabrications.
Well that's very entertaining, but sill doesn't engage with his actual points directly. "You have rules - have a purpose in life, and we have rules - gender pronouns". That's not an equivalence. Peterson's rules are just guidelines, in Canada the gender pronoun thing is a legally compelled requirement under which Peterson's University tried to officially discipline him, not a guideline.
Fobbing that off as "well he's just being mean to us nice people", when they went after his career and means of supporting his family (at the time), doesn't cut it.