> Similarly, collectivist organizations always seem to result in top-down totalitarian regimes when they win the government.

Substantially, that's a matter of history rather than ideology. Collectivist organizations that aren't top-down organized tend to be unsuccessful in overthrowing states and remaining in power in the face of more authoritarian opposition. The fact that the Russian revolution led to Stalinism is more survivorship bias than anything else.

You may also be underestimating the authoritarianism of right-wing institutions in US society just because they seem natural and normal to you.