These discussions on communism vs capitalism that devolve into comparing the US with the USSR are like discussing feudalism vs liberalism in 1825, when the only perceptible legacies of the French Revolution were the Reign of Terror and Napoleon's degeneration into monarchy.
If you're sensibly anticapitalist, for the love of Marx do not argue in favor of states that rejected all pretension of wanting to let the economy be democratically managed, ultimately turning into party-controlled hierarchies rather than socialism. If you're a liberal in 1825 and rather than arguing in favor of ending serfdom and enfranchising everyone you keep going on about how Robespierre wasn't really that bad, you're politically useless.