My biggest problem with Rand is not even really her thing about empowered individualism (I'm American, I live in a country that runs on the idea on an ideological level)
Yeah, except that this notion of 'individualism' is of course completely contradicted by taking refuge in nationalistic stereotypes ("I'm an American!" etc), not to mention that her notion of the individual is itself a purely alien capitalist construct, its mere agent of replication.
which does seem to make more sense if you read her work in the cultural context of its time--
Or less sense

Does her subsequent replicant, Margaret Thatcher, make 'sense' in
her cultural context?. Just as Rand's (then marginal) ideology has now become mainstream institutionalized, so has Thatcher's, hubristic Oedipods.
it's her flagrant misapprehension of what "the Ego" is in a first-hand psychoanalytical sense. I really blame her for the pop-psychological term "ego" that Americans use to mean "self-image" or "self-worth" that has nothing to do with Freud's original notion of the "Ego" as reality principle.
(fwiw, "ego" just means "I" in Greek...)
Sure, though I wouldn't necessarily scapegoat her. Ego at its purest does correspond to the Imaginary (the result of Lacan's Mirror Stage), but increasingly today the ego-ideal/ideal-ego has become indistinguishable from the (symbolic) Big Other itself. The (non-existent) Big Other is
all that exists for many of today's ego-maniacs ...
[Oh, I see that Tate is an unreconstructed classicist:
that explains his intellectual terrorism elsewhere ...].