During the entire period of the second world war, from September 1939 to the surrender of Germany (and beyond) was there any way that the Luftwaffe could actually win their air war against the various opponets they faced?

The Luftwaffe won against a number of second and third rate powers like Poland and Yugoslavia. They were able to defeat the French and British (along with the smaller nations involved) in the Low Lands campaign in the spring of 1940.
After that, the Luftwaffe at best was able to do no better than manage temporary draws in aerial campaigns; eventually losing every one of them. Starting with the Battle of Britain, the Luftwaffe was unable to come up with a winning strategy. Then in the Mediterrainian they lost to the combined Commonwealth/US effort. Initially very successful in Russia the Luftwaffe could not turn their decisive strategic victory into an aerial win. Then the following Bomber Campaign did nothing but drain German resources while slowly grinding the Luftwaffe into ineffectiveness.

Given history, what could have been changed in the Luftwaffe's strategy to make them successful, if anything?

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