He used to eloquently talk about more straightforward issues to do with class struggle. The problem is when he decides to take that approach to science but then found himself going against it, and doubling down.
It’s basically how a lot of commentators get into a bizarre rabbit hole and come out with some wild ideas. It’s a basic trap that many of them fall for.
But that said he’s always had a reputation for being a “playboy”, so this isn’t really a surprise. Lots of dudes from back when he was on top have turned out to be really shitty.