It's not the best written work of fiction, by the way. I'm around page 900 or so, and most of it seems to be thinly disguised rants by the author, interspersed with laughable descriptions of sex, and a really nasty strain of Social Darwinism. If this had been written by a German in 1934 it would probably be recognized as thinly disguised National Socialist Party propaganda.
That's a pretty silly thing to say. The prose may not suit your literary tastes, fine. But you will still agree that the Nazis and the Soviets were both the real templates for her 'evil collectivists'.
And collectivists they were, not just in their party name ('national socialists'). They more or less nationalized most of Germany's industrial private properties, some of it sooner, the rest of it later. They implemented most bullet points of the Communist Manifesto, only in a brown flavour and with a lot of add-on horrors on top of it.
Yeah, her 'heroic romanticism' style may resemble some of the red and brown 'romantic' literature. But her content is vastly opposed to theirs. If anything, she took a style that appealed to the masses in the 30s and 40s (including America) and showed that the same devices can be used to convey the opposite message, radical individualism and libertarian capitalism.