In a "Nazis win and take over the world" TL most Allied nations would be viewed pretty harshly, particularly the USSR.
The USSR would not be viewed. Like, not, at all. The Nazis did not just plan to cancel Jews, Roma, most Slavs and Communism out of existence (both collectively and as individuals). They also explicitly wanted to erase any memory that any of those
ever existed (and the memory of their crimes againsts those
therefore nonexistent entities with it).
Not only exterminating Jews, but exterminating any awareness that Judaism was ever a thing. Not just killing Poles, but destroying any concept of a Polish state or nation present, past or future. Not just destroying the Soviet Union, killing, starving or enslaving most of its people, and destroying their cultural memory, but annihilating any notion whatsoever that people anywhere could even entertain a notion of trying building a political community based on hopes of equality, and freedom from exploitation.
Of course, the Soviet Union had already turned out
not really even trying to approach such sort of hopes, to put it mildly. But it still embodied a glimmer of those for many people, and the 1917 revolutions had that as a driving force. Had the Nazis really got their way, nobody would ever
even know that any revolution happened in 1917, especially not in Russia... since nobody would be supposed to know that Russia even ever existed in any form whatsoever.