Communism only works on a small scale. The second society gets bigger, you require a state with militaristic presence to keep the people in line. To this very day, the Marxist ideal of a "dictatorship of the proletariat" has ALWAYS resulted in centralized power structures that became brutal dictatorships.
No matter which country you pick, large ones like china or the soviet union or smaller ones like cambodia under pol pot or vietnam under the CPV, all of them have devolved into a dictatorship. Even "experiments" like yugoslavia under tito were, in the end, still dictatorships where political opposition was disallowed, a secret police was founded and tito still had absolute control. Now, you might say: "But the people lived well!", yes, for about 10 years until the 1960s where the country suffered a massive economic crash, insane debt (because commies suck at economics) and inflation. Tito was able to hold it together with sheer force until he died, and after his death, yugoslavia completely unraveled into the mess it is today.
I know you like to cope with "oh no the evil CIA again >:(" but in the end, communism is a failed ideology that will never work on a large scale without completely suppressing individual freedom and brutally knocking down any sign of dissent.
Edit: By the way, I'm more than willing to argue about this - however, I just noticed that I'm on lemmy.ml so I'll most likely get banned for not conforming to the tankie-ideals.