Britain could've had the chance to bust those german asses.
1) They had plenty enough foreign colonies ready to join there ranks.
2) The tide in Europe was turning. Hitler became insane, resistance became stronger, some German generals were planning an assault on Hitler, others became cowards and commited suicide or ran away.
3) Some of the only airplanes that could challenge a Messerschmit were the Spitfire and the Hawker.
4) Russia left the axis.
So Britain only needed some more time because, I admit, USA had a lot more punch.
They had a great Navy too, but the drawback was the fact that the German Wolfpacks dominated te seas around them. But they owned the Bismarck hard, didn't they?
But I'm glad USA and Canada joined in. Especially Canada, because they liberated my town.
But guys, you can't change history. We are thankfull that they came to aid us. But we are also proud of our European soldiers who died or survived, giving everything for the freedom of everybody.