There has never been a communist country; only countries run by communist parties.

They were “communist” just as much as North Korea is “democratic”.

Just because a word exists in a name, doesn’t mean that the word actually applies in any fashion whatsoever. The political parties of both the USSR and China were as communist as fish are birds. Which is to say, absolutely not. They wore “communism” as a thin veneer of legitimacy over a bulwark of feudalistic authoritarianism.

And the real clue is in the name: Communism. Communal. No real leaders aside from administrative functionaries. Classless and cooperative. Everything that the USSR and China never was.

Edit: Russia became communist in 1917. By every metric with which you could possibly measure communism, it was dead by 1918.