The entire first half of the first chapter of the Communist Manifesto, for example is one long description of how the bourgeoisie / capitalist have driven humanity forwards.
> It did.
It did not. Not past the October "revolution". The Bolsheviks played with it as long as it suited them (that is, as long as they did not have influence in the democratically elected Provisional Government, but had influence in the Soviets set up in the Moscow and Petrograd soviets), but when it was clear that most people did not support them, they quickly curtailed the power of the Soviets and hunted down and murdered thousands of leaders of opposition groups that countered their influence in them. Including Marxists.
> Stalin was not distortion, there were other leaders similar to him, who would take his place if we would not exist
After he had murdered and exiled the opposition in his own party, yes. Which against followed the murder and exile and prohibition of Marxist and other socialist groups years earlier.
[EDIT: Maybe whomever downvoted could bother replying]