[ElAurens]

The simple fact is that up until the Battle of Britain, the Luftwaffe had never faced an adversary that was even mildly prepared to go to war.

The same was true of Barbarossa. The Russians were poorly equipped and trained, had the best of their officer corps murdered by Stalin during the Purges, and had a high command that thought they would not go to war with Germany because of the non-aggression treaty.

Add to that the fact that the Luftwaffe leadership was overly political, and had only a short experience of actually running an air force, coupled with an industrial base that didn't go on a "total war" footing until the war was pretty much lost, and had a raw materials supply chain that was tenuous at best, and failure was pretty much the only outcome.

In spite of the obvious skill of individual pilots, the Luftwaffe, like Germany as a whole, never had a chance in the long run.

Much the same can be said for Japan.