They weren't able to freely engage Spits & Hurris for the most part. As the bombers took unexpected high losses, the fighters were ordered to fly close escort, robbing them much if the initiative. And this lead to increasing frustration which led to that famous comment, because Galland (and others) felt they were not using their weapon to it's best capabilities
As escorts, weren't they supposed to engage the British fighters, and kill them or draw them away from the bombers? It's not like they were supposed to sit back and watch. They were there to kill the Brits, who were supposed to be trying to kill the bombers. Add to that the fact that while the Germans knew
where they planned to attack, while the Brits had to do their best to figure it out...
If your fighter is equal or superior to your opponent, you have superior numbers, and he (the enemy) is trying to kill a bomber, I guess I'd expect you to prevail. Honestly, I can see why Goering was irked.
I'm having a hard time believing that the 109/190 models are porked due to "Allied infatuation". Prior to this long, drawn-out discussion, I'd have thought it to be an interesting possibility. After all, the Allies did win, so get to write the books, right? But, as more information is brought to light, my doubts that this is the case are really increasing.
The American's also won the fight against the Native Americans, but we don't see the books stating "The American's won due to the inferior fighting ability's of the NA's". On the contrary, it's common knowledge that the fight was won through killing the women and children and destroying the food sources and homes of the NA's. It wasn't a "glorious" victory, but it was effective.
In a "glory" sense, it would make more sense to pork the Allied planes, and "beef up" the Axis planes. That way the "bragging rights" would be better. As in, "We won the fight, even with inferior equipment".