I agree, the English had no hope of defeating Germany on their own and knew it, were just counting on the United States to eventually join the fray.
Is that because the Germans are so uber and powerful and skilful? Wow. Must be the aryan DNA huh?
One factor I never see raised in these slightly dubious discussions is that the fight was by no means even because Germany essentially had a twenty year advance over everyone else with equipment and tactics. They started with no legacy weapons, a completely re-structured military a huge R&D budget and used the Spanish civil war and other naughtiness to test elements of a new approach as far removed from the previous trench warfare as possible. It was indeed innovative but let's not forget why it was motivated. In the interwar years Europe was fumbling with the concept of trying to move to a world peace philosophy - so outraged were most NORMAL people and governments about the horrors of the first world war. Just look at the arts movements and social developments of the day. Look at the policy of appeasement and that poor deluded fool Neville Chamberlain. Hitler and the other fascists took advantage of this movement to rearm with a vengeance while externally promising peace. The back-stabbing, lying, monotesticular, scumbag.
Britain did not have the capacity immediately after the BoB to counterattack anything interesting and Germany's U-boat blockade was to try and forestall the inevitable and Hitler bloody-well knew it. Had America stayed out it's highly likely Britain would eventually have closed the technological and tactical gap - even it it would have taken to the late 50s - and some kind of different landscape of Europe would have eventually announced. There is evidence for this if you compare equipment towards the closing of the war. They were never going to leave Hitler unmolested if they could. This was an ethical as well as political objection. Go listen to Churchill's speeches.
But by no means let any of those factors disturb your Luftwining, slightly racist, unobjective delusions that Nazi Germany was noble and uber alles and that Britain is and always was the bad guy in every possible scenario. A not uncommon point of view as it deserves to be, apparently.