Communism doesn’t include a hierarchy of power enforced by violence
Very convenient, since nothing will ever meet this standard, so you will be able to say “that’s not communism” for the rest of your life. Actually sounds like the definition on anarcho capitalism
The two concepts are antithetical
Maybe to you, but many of the people in power at the time believed they were on the way to communism
USSR was somewhere between capitalism and fascism
I know of two common definitions of capitalism: “a system mostly organized around a profit-motive” and “a system in which individuals are mostly free to enter into consensual contracts”. I don’t see how the USSR is close to either of these. It was closer to fascism, tho there are also large differences