That's not surprising. Post 2000 Chomsky is worthless, he couldn't defend his original thesis without ad hominems and used his fame to put pressure on universities (it didn't work every time, but enough), he pushed a decade backward part of the linguistics field (after pushing it up maybe two decade forward, but that's not an excuse).

Especially in humanities where you don't have hard data, contradiction is the only way to advance, and he forgot that. He became too full of himself and too confident.