CHINESEBOTTROLL

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

failed attempts

They didn't fail. I mean you can criticize the ussr, but it was not capitalist

which were sabotaged by capitalists

What a weird thing to say. The USSR had sovereign control over the largest country in the world by far + a lot of allies. The capitalists can't even get rid of north Korea. Its not the capitalists, the system is just shit

the need to rebel is the problem

I mean its fine to rebel, but if your goal is communism I will bet on another case of "tHatS nOT rEaL coMMUnIsM"

countries in which the Dictatorship of the Proletariat failed to cede power to the working class and establish a socialist economic structure

Oh, so like every single other place that tried to implement that deranged system? Thank you for this very important distinction.