I'm not a socialist by any means (well, I have been called one by republicans...) but I've always hated this argument. The USSR and China are the only two I'm aware of that weren't massively screwed over in their infancy by the US, and/or (usually and) manipulated by the USSR.

Cuba, Vietnam, and Laos for starters China went from a century of humiliation to a superpower in less then a century thanks to socialism. The USSR was better than the feudalism before it or the dictatorships of the bourgeoisie that came after it by a wide margin. For a place much poorer than the US, they had similar nutrition, better education, more rights for women both legalistically and practically.

Oh, throw in east Germany too. Do you know what the Stasi did to the lgbt movement that they saw as subversive? Destroy it by ending discrimination against gay and trans people, including a massive education campaign to eradicate homophobia and transphobia and state funded gay bars. Compare that to how the US was treating gay people at the time.