Minimia Moralia for example is a collection of more personal and essay form writings.
Also I absolutely love Negative Dialectics as a piece of theoretical writing but I am not convinced it fits into the standard "Frankfurt school" label. It's more about epistemology than it is about culture.
(He was, however, more than a bit of a snob. I wouldn't take his musings on culture at face value unless you truly believe -- like he did -- that jazz and other popular music is just intrinsically and objectively worse than Bach forever and always absolute truth. Ahem.)
I mean, no. That's a complete misreading of Marx. (Though perhaps one that was convenient to Stalinists or Maoists to continue to let breathe...).
For one, it would only apply to Marx in his 20s. Grown up Marx substantially threw out most of the Hegelian stuff, seeing it as superstitious nonsense while he studied commodity prices in the British Museum's reading room.
Or at least -- in his own younger-self terms -- he "turned it on its head" by throwing out the Idealist aspects of the dialectic. Even a traipse through the Theses on Feuerbach shows him rejecting all the transcendent forces of history crap.
I'd argue by the time we get to Capital the dialectic and the Hegel stuff generally is barely present.
If he is speaking of dialectic, it's mostly as "here's a way to look at history as it has happened, let's go poke at the contradictions and see what's in there" not "here's a recipe for how history works and from this we can predict..."
And back to Adorno, this is actually precisely what he is getting at in Negative Dialectics. Reinterpreting the "dialectic" as a non-Platonic, non-Hegelian process of looking at contradictions in reality and history but without expecting any kind of unification or resolution to a more perfect form. Living with the negative and the unknowable. Because the alternative, in Adorno's mind, was the path to Auschwitz.
Something about people pretending it was the official ideology of half the world tends to do that. The old man himself would have thrown up into his soup if he knew.
Did capitalists do this in any comprehensive or satisfactory way prior to the advent of capitalism? I’m not a communist, but this seems like a fairly weak criticism.