what matters is how you adjust vs your mistakes. Everyone makes mistakes, even during military operations, because nothing is known in advance.
With massive aid from...the United States.
Somehow I don't see the US running arctic convoys round the clock to re-supply the Russians this time.
Did you perhaps grew up under Russian occupation, like I did, and not learn in school about Molotov–Ribbentrop Pacts? We were only taught the part after 1941 where Russia gloriously liberates Europe.
I did personally know a person that was close to me (he passed away about a decade ago) who had been a soldier on that front, he was in Odessa, in Crimea and all the way East to the Don river. He considered that the war started when his commander in chief at the time, marshal Antonescu, had ordered him and his fellow Romanian soldiers to pass the Prut and attack the Soviets, in June 1941. As it happens marshal Antonescu is considered a war criminal, and he was indeed a war criminal if you look at what he did to the Jewish population from Romania. That didn't count for people like that close person of mine I had told you about, who regarded him as a hero because marshal Antonescu was one of the the only persons who really wanted "to defeat the Bolsheviks" (I'm quoting my close acquaintance on this). That's why history around these parts of the world is really, really complicated, is not black and white all the time.