That is a problem of how revolution works, not a problem of communism.

Create a power vaccuum, and those who had the most power will STILL have the most influence. Even if you literally killed all the old power, you would be immediately creating an authority structure with the legal authority of capital punishment, which many, MANY communists wouldn't agree with.

The problem is horrible people exist, NOT the concept of communism. For every reason people shit on Communism, there are twenty valid reasons to shit on capitalism. Neither system works in the real world on its own. To pretend like capitalism is magical in comparison is literally failing to observe reality.

The rich and powerful constantly shit on political action because it IS effective. They do not enjoy going through the effort of retaining power through internal conflicts and ESPECIALLY not actual revolutions. Why would they EVER tell you the truth?