Hitler only cared about Germany, and that meant drang nach osten. Nowadays there are all kinds of self-proclaimed "nationalists" who don't get that sort of thing and always say weird things like "I support nationalism for everybody!" I don't think Slavs are shitty, but I get why Hitler thought so, and he definitely did think so. When he spoke of the Russian race, he always did so with disgust. He guarded Russian prisoners after WWI and apparently didn't have a positive impression.
From all I gather, Uncle Wolf wasn't interested in being the defender of Western Civilization even if that's effectively the role he was cast as. I have books of reprints of Signal magazine issues that show that a clear propaganda focus after the conquest of France was the establishment and defense/expansion of the New Europe, but I don't the Fuhrer's heart was really into it. Even foreign fighters in the SS were shocked by how harshly the Germans treated Russians on the Eastern Front. They signed on to combat Bolshevism and would've been happy to play liberator, but the Germans were fighting a racial war.
Maybe it would have been more internationally ideal if Barbarossa was a liberation campaign, but it's important to try keep an accurate view of how things really were. Especially somebody like Hitler who was such a spectacular and unprecedented character that he could be all things to all men. Anti-White Genocide activists will say he was the defender of Western Civilization. According to Varg, Hitler was leading a pagan campaign to resist civilization itself. Then there are cargo cultists like Savitri Devi. But as always, the reality is more interesting than the fantasies. In any event, I think the world is in debt to Hitler for launching an annihilation war against Russia that at least permanently crippled the Russian nation.