Excuses. He was an academic failure before that all happened.
He has a PhD. Many PhD's kept giving him grades good enough to become a PhD. Academic journals keep publishing his research. His PhD isn't in political science. He has an undergrad in poli-sci i believe. If he was wrong about Marx and nature, which is a fair point, that doesn't make him "a fraud", it makes him incorrect on that point. Academics are allowed to be wrong. Marx was wrong about a lot of things too, and right about a lot of things.
Peterson is not much of an academic authority on politics. He has just modestly educated opinions, he's a culture warrior. Take him or leave him. You're a left-leaning type, as is Black Dog, we get it. Some of his political opinions are backed up by his actual expertise, which is psychology, I take those opinions more seriously because he cites the research in his arguments. I don't even know why people care about his opinions on Marxism. A poli-sci PhD academic should not be an activist on whatever they're researching, confirmation bias sets in. JP is a political activist.