Most people when you get down to it agree with communism but they don’t know its called communism, socialism or Marxism.
Because they don’t know what it is they think the USSR was communist.
During the 19th century there was a debate amongst the socialists about how to get the means of production out of the hands of private individuals and into the hands of the workers.
One side said that we could use the political institutions (like representative government) to peacefully gain control of the state.
Once control of the state was achieved then they could use the states power to take the means of production from private individuals and give it to society.
Then the state would give more power to the people. Eventually you would have a kind of anarchism. Where the state was either non existent or acted as a pragmatic help for the will of the people.
The only difference between the communists and the socialists was over how to gain control of the state.
The communists were for a violent take over.
Which they did in 1911 I think.
Lenin said that what they had then wasn’t communism but a step towards it.
A bit later Stalin said it was communism.
But it wasn’t because yes the state had taken the means of production but it hadnt given them to the society.
In effect the state became the sole capitalist (USSR, China and most so called communist nations are really examples of state capitalism)
It was a failed attempt at bringing about socialism. All because the attempts to bring it about have failed so far doesn’t mean it is bad or wrong.
All that failed attempts indicate is that a learning process is occurring.
There were numerous failed attempts before capitalism managed to take over from feudalism.
And many atrocities especially committed against children in the industrial revolution.