Communist governments are not "autocratic regimes that oppress the people living there". That's propaganda. They are socialist governments where the proletariat controls the State through its Vanguard, which is the Communist Party. If there is a fact that distinguish socialist countries is the desire to provide a high standard of living to their citizens, with a special emphasis in education, health care, and erradicating poverty. The USSR, Cuba, China, and all socialist countries were extremely successful in that, so no, they don't "oppress" their people, the people actually govern the State, and not the capitalists.
Comunist states are very sucessful, that's why the West needs to invest so much in wars, propaganda, coup attempts and economic warfare to try to destroy them.
Think for a millisecond, if socialist states weren't sucessful, why the US would spend so much effort in trying to destroy them? It doesn't make sense, simply let them fail, after all, communism doesn't work, right? Why would someone dedicate any effort to destroy something that is already doomed? The answer is simple: communism DOES work, IT IS sucessful, and if let alone would quickly become unstopable. That's why the West has always tried to destroy it, because they don't want the world to realize that a viable option to capitalism exists.
