You seem to forget that there were quite a few bases in Europe under the Soviet flag, which ended with the dissolution of the USSR.
Only you can decide whether you think this was the Russian flag or not but I suspect you will not be able to simultaneously argue that it was the Soviet flag during WW2 and the Russian flag during communism. If you believe Russia occupied countries such as Ukraine and Belarus and controlled/occupied Poland, Romania etc, then you will have to accept that the Russians did in fact do the most to defeat the Germans.
If you don't believe it was Russia, and rather the USSR, then you will have to accept it was the collective efforts of countries of the USSR (and the occupation by Russia falls into doubt).
You can't have it both ways.
In either case, the Americans played a lesser role in the defeat of the Germans in WW2 and more properly could be credited with defeating the Japanese. This would make sense as the US is more a naval power than a land power.
Only you can decide whether you think this was the Russian flag or not but I suspect you will not be able to simultaneously argue that it was the Soviet flag during WW2 and the Russian flag during communism. If you believe Russia occupied countries such as Ukraine and Belarus and controlled/occupied Poland, Romania etc, then you will have to accept that the Russians did in fact do the most to defeat the Germans.
If you don't believe it was Russia, and rather the USSR, then you will have to accept it was the collective efforts of countries of the USSR (and the occupation by Russia falls into doubt).
You can't have it both ways.
In either case, the Americans played a lesser role in the defeat of the Germans in WW2 and more properly could be credited with defeating the Japanese. This would make sense as the US is more a naval power than a land power.