Tbh that's mostly true for any kind of existentialist and societal philosophy in modern times. Think about it, these people most of the time believe that nothing makes sense. So them spewing thousands of pages written in sophisticated english to come up with no significant conclusion beyond "nothing makes sense" equates to them sucking themselves off for no reason.
The only interesting philosophy nowadays is the hyper-specific one. There's still some interesting philosophy stuff being written and debated nowadays on shit like animal rights, ecology, philosophy of science, bioethics, et cetera.