100% agree.
I don't think he actually read the whole Manifesto through tbh and if he did, he was too busy coming up with his own personal objections to each sentence that he was clearly unable to see the forest for the trees.
I'm not saying that he would have come out of the reading as a freshly-minted Marxist but he was really grandiose and slimy about his refuting of the communist manifesto in a way that was obvious he thought he had this list of epic gotchas but it just showed that he didn't go into reading it with the intent of understanding it or refuting it from its own internal logic.
I'd tolerate his approach to the manifesto better if he made asides to how it didn't address this or that issue before proceeding to critique the actual content and arguments of the manifesto itself but to expect that someone would provide an account of human nature in a 30 page pamphlet while expounding upon their entire political philosophy is, frankly, ridiculous (and even moreso when you're expecting Marx of all people to do that.)
Peterson is such a pseud.