Don't know how you can say that they certainly didn't want to be part of it, when their actions tell a different story. Lend-Lease for instance.

It would have been a lot more difficult, but Russia was destined to overtake Germany even without the Allies help.

I'm sorry, but that is at best an incredibly simplistic view. Russia got a lot of military supplies from the west, and Germany spent a huge portion of its air capacity on britan. If the allies hadn't taken north Africa and the mideast back, Germany would not have run out of oil either.

Your claim is just wishful thinking, not history.