The extreme recoiling and rejection of the clearly obvious idea that most left-wing movements were hilariously co-opted by the IC circa the 60s (likely continuing now) and that critical theory specifically is co-opted, is evidence of it happening. We've both posted multiple articles showing evidence of this, but folks in this thread get big mad when you bring this up.
Btw, if you want a rejection of meta-narratives without fashionable nonsense, go read STIRNER