Are you arguing against the conception of critical theory, or against its practice? Against the Frankfurt School per se, or against the postmodern extension of the original ideas?

Because the criticisms you levy mostly don't apply to, say, Horkheimer's idea of dynamic unity with the proletariat, just the implementation by, say, people in French universities.

There are devastating critiques of (original Frankfurt School, which contained a lot of focus on power but not to the extreme extent that came afterward) critical theory in conception, but I don't see them amongst the complaints you levy.

Pragmatically, critical theory has very little to recommend it: it has accomplished approximately nothing aside from, in the long run, confusing discourse, obscuring the distinction between knowledge and belief, and stoking intra-societal conflict, all in relatively modest ways. Marxism, in contrast, has at least done something, though a quick tally of the frequency of atrocities among self-styled Marxist governments would tend to suggest that Marxism-in-practice is at best an extremely dangerous ideology to reach for.