The USA didn't New Deal hard enough to keep up with the rest of the "Western" world's more humane form of capitalism, which you can see in how consistently the USA lags behind other countries in measures of actual human progress and comfort.
While most "Western" countries suffered through similar technocratic, neoliberal turns in the 80s, they were built on a stronger social democratic base than the USA.
And don't get fooled by "horseshoe theory" ignorance: Fascist states were/are authoritarian by definition. Communist states were/are authoritarian by culture.
The USA oligarchs were watching Lenin, Mussolini, Hitler and New Dealed just hard enough to blow some steam off and keep things mostly as they were.
If you believe Smedley Butler, at least some of those USA oligarchs were big Mussolini fans.