“russia always falls unless germany takes london first then russia can hang on for a long time”
Yeah I don’t think you can toss out a blanket statement like that. There is a lot that the allies can do to stall the German onslaught, then turn things around. The allies (UK) need to hold places like Persia to allow air traffic into Moscow, maybe even carrier planes fly into Russia. UK filtering ground units up from India/Egypt to hold the back door, pressure/landings in Europe to force Germany to spend income in defense instead of only on the eastern front etc…
It’s not easy, and takes a concentrated effort. Sometimes it comes down to the final battle for Moscow, but the allies can make it a last desperate move for Germany. Even if successful what did it cost the axis, and do they have good position. Are the allies closing in ready to liberate the Russians right away, who has Italy, hell maybe the French are even being liberated (the later would be strange from what we’ve seen, but it could happen).