Even if that’s true, so what? You are just pointing out one possible reason why communism doesn’t work in reality. Still doesn’t work.
If I say my immortal potion recipe would work in an alternate reality where humans didn’t breathe oxygen, it does not make it any more useful. Equally, in our reality, coups, assassinations and embargoes exist. If a political system can’t withstand them, it is not useful.
The Russian Revolution was communist but the USSR was never communist.
Yes. But what does that mean? If I have a recipe for potion of immortality, but anyone that drinks the resulting potion dies instead, it’s a bad recipe. It doesn’t matter its promise of immortality sounds good.
Communism makes good promises. However, every time you have a communist revolution, it ends up being authoritarian instead. What does that say about the communist political system?
Go move to Cuba then.
Minecraft ;)