I challenge you to produce a single example of a true communist society. What western capitalists fought is the militaristic expansion of the Marxist ideology wielded as a tool by totalitarian governments to control their own people and attempt by force to control others. While most western governments are imperfect and constantly struggling to meet the needs of their people while also trying to be "fair", attempting to reach utopian society using violence and oppression could never result in true communism.
Even the most purely intentioned revolutions succumbed to totalitarian rule by dictators. In a true communist society their would be no elite rule over the people and fair distribution of resources to all regardless of education and popular status. That will never ever happen in the real world.
by your own words you have also shown that communism does not work, because, like you said, give an example of a situation where a group of people who were aiming at creating a communist nation actually succeeded at creating a prosperous communist nation.
It just hasn't ever worked. You can play the "what if" game until the cows come home, but it won't change the fact that communism has always ended in failure.