Hitler was the one who ordered the Luftwaffe to shift their priority from attacking the RAF infrastructure to bombing other targets, partly in retaliation for the British managing to bomb Berlin.
Goering was an interesting character. As a WW1 ace (and the successor to Richtofen in command of the Flying Circus), he was a kind of rock star in Weimar Germany And like a lot of rock stars, he was also vain, hedonistic and completely amoral. I tend to doubt that he was really a "true believer" Nazi, and instead was an utter opportunist.
On the other hand, he might have been one of the smartest of the Nazis. His performance at the Nuremburg Trials, once he'd been weaned off his morphine addiction, shows that he was not an imbecile. Even the prosecutors developed a grudging respect for him, at least in comparison to his co-defendants.
I stand corrected. I take back my “Goering was an imbecile” remark.
You are right, it was Hitler himself who ordered the shift away from the RAF.
In fact, it’s probably true that every blunder the Germans made in WWII was directly ordered by Hitler.
He was good at bullying the weak-kneed West in the 30s, but once real war started, his bluster and arrogance led him to make one bad decision after another.