The Soviet Union was not communist. It was not marxist, it was not Socialist, it was not any of that. Those terms were used as lip service and propaganda to allay the masses in the first waves of revolution, and then simply became rote nonsense after the Bolsheviks secured power. In every other way, shape, form, and function, Soviet Russia was a fascist dictatorship. Yes, Fascist. One party engaging in for-profit rule. and yes, it was right wing - breakouts of actual leftism or socialism were treated as threats, and met with force. Rule was autocratic and militaristic. Ethnic minorities were hailed as "members of the party" in the rhetoric, and then forced to "become Russian" in the reality. Sexuality and religion were tightly policed (it wasn't that religion was outlawed; it was that religion was state-controlled.)
Aside from empty rhetoric, there was absolutely nothing "leftist" in the character of Soviet Russia, or China / Korea for that matter. Castro and Ho Chi Minh were probably honestly interested in real communism, but, well, maybe that's why the US busted its hump to crush the everliving fuck out of both Cuba and Vietnam? it's certainly why we swung our might around to topple "pink" governments in Latin America and prevent their rise in post-colonial Africa.
Trying to tie communism (or more egregiously, socialism) to the USSR is just false propaganda at its deepest. The hilarious thing is that even if it were true, the USSR kept pace with the United States on every front until 1991; they weren't called a superpower because it's a funny name we hand out to just anyone, after all.