Some good points, twablalock, but you left out some essential stages in the history.
To start, Marx predicted that the alleged contradictions in capitalism in advanced industrial economies would lead to a workers revolution, with a pre-industrial country going first to socialist economics without the capitalist phase being seen as rather dubious. When decades went by and this failed to happen, it lead to a great crisis in the communist movement. One faction, lead by Eduard Bernstein concluded that revolution was impossible and so joined in with the social democrats, hoping to bring about socialism by gradual reforms.
The other faction, lead by Lenin, stuck with revolution as the means, but lead by a tightly-disciplined group of intellectually-oriented political activists. Lenin also thought that revolution had failed to occur because European nations used the profits from imperialism to pay-off the workers. That is important because he also thought this system, once it had expanded around the world, would lead to a world war that would destroy it, and then all the workers would revolt.
That in turn mattered because Russia, as a largely pre-industrial state, was not seen by marxist ideology as ready for communism, and so it would seem the communists should not try to provoke a revolution there, but Lenin believed that after the European war and communist revolutions there, the industrialized would aid a Russian communist state.
Well the great war came, the Russian communists started a revolution and took over, but after the war capitalism did not collapse. The question then was whether to switch to a capitalist state, or try to go ahead to socialism anyway. Lenin pushed for the first option, then died, there was a long power struggle between Trotsky, Bukharin, and Stalin, with the last eventually winning.
Stalin said he was for the capitalism option, but after a while switched to a brutal, totalitarian version of socialism, and this produced very rapid industrialization, but never a transition to true egalitarian socialism.
But in the meantime Mao took this to be proof that a non-industrialized nation could move directly to industrialization and eventually true communism (as did a great many 3rd world leaders and revolutionaries), and so when he came to power, went ahead with an even more brutal version.
In both cases, Russia and China, totalitarian industrialization eventually stagnated and went backwards. The Russians, under Putin, eventually opted for crony capitalism, the Chinese for a freer but still quite corrupt version.
It's a long, crazy story, full of delusions and failed predictions.