So you sound like you are probably a lot more educated about politics than I am, so hopefully I can learn something from you, but I think one problem in practice is that collectivist views always seem to end in authoritarianism. Even in the U.S., the unions that resulted from collectivism became authoritarian and corrupt in their own right, the teacher's unions of America being a prime example of corruption and authoritarianism. Similarly, the auto workers unions have been a death knell to the American auto industry.

Anarchism isn't really a valid practical stance. Once you burn down the existing system, something has to replace it, and, to my limited knowledge, that has always been a dictatorship of some kind. Maybe that's just the simplest government one can form. Similarly, collectivist organizations always seem to result in top-down totalitarian regimes when they win the government.

America worked because the original founders were willing to give up power even though the people wanted to make them kings. At the same time, they established a system that made it hard for any one person or group to quickly amass political power. It seems like the left have, for the past century, been successfully dismantling the separation of powers, starting with Woodrow Wilson.