OP’s comments seem to indicate that they are asking in bad faith, but seeing no evidence given in other comments than “whatabout famine under capitalism?”:

destabilization efforts and economic sanctions. western capitalist countries, like the us, did a shit ton with the direct intent that communism would be utterly untenable. this was not 100% of the story, but in combination with policy failures and natural disasters, there is a lot more to blame than “the revolution.”