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”