The fact that Britain was constantly bombing Germany really helped? It helped absolutely no one anywhere, not the Brits, not the Russians, not anyone else. Russia knocked out the Germans out of the war, and while they may have been part of the Allies which fought against Germany, they contributed more than any other nation by a large extent.
I don't see how not invading and conquering more lands is screwing up. I mean, the United States hasn't conquered any sizable land since what, the Spanish-American War? I would hardly call America militarily unsuccessful because of this though. Your standards are just bad.
Moved all posts relating to the subject of Allied Bombing during WWII from here:
http://www.twcenter.net/forums/showthread.php?302559-Most-militarily-successful-nation/page17