I don't know how WWII is taught now, but when I was taught about the Great Patriotic War in school there wasn't really anything explicit about how it was USSR alone that won the war and the Western Front didn't happen. Sure, it was mostly about the Eastern Front, with the Western Front mentioned mostly in passing, but it's kind of expected, since countries teach history mostly from their point of view, and WWII is just too big. And there was a chapter devoted to Lendlease. I don't actually recall any actual mention of Pacific theatre resolution, though, but that might just be my memory. The Molotov-Ribbentrop pact was mentioned too, heavily flavoured with "Stalin didn't really see any other choice, had to stall for time and shameful Poland stuff was mostly about putting the border as far away from Moscow as possible".
I can see how "USSR won the WWII in its lonesome" mentality can be formed, but then it isn't really that different from...
Exactly this...