A lot of that crap, including Pollack was paid for by the CIA with the deliberate goal of demoralization of the USSR somehow. I think it’s pretty obvious they were aiming at the west too.
https://daily.jstor.org/was-modern-art-really-a-cia-psy-op/
I read Rookmaaker's "Modern Art and the Death of a Culture" may years ago.
https://tinyurl.com/37cyk2wm
I don't recall if he mentioned the CIA-thing.
(might have to read it again)