There wasn't that much American aid to begin with, and there were a lot of reasons why the Germans were defeated at the Battle of Britain. Also, the Pacific WAS gobbled up by Japan, and China had been ruled by the heavily right-wing Chiang-Kai-Shek.
Britain was certainly able to win the Battle of Britain alone politically and militarily, but they depended on American aid financially.
Besides, the Japanese occupation was temporary; if it weren't for American intervention, it would've become pretty much permanent, just like the NATO, but then with Fascist dictators instead.
By the way, you haven't mentioned when Americans
screwed intervention up completely
I DID mention Iraq, and I also said why I thought Iraq was wrong (Saddam Hussein had insufficient connection to 9/11 to justify the invasion), although not morally deplorable, considering Saddam's crimes.
But I thing all the other examples were pretty much over scrutinized. Korea and Bay of Pigs were justified IMO, but America's handling of these wars was indeed clumsy, and that's why DPRK and the Castro regime weren't destroyed despite they could have been. (btw, without US involvement in Korea, the entire Korean peninsula would have been overrun by Pro-Soviet forces which would have created a deadly precedent)
Vietnam maybe was a wrong decision too, and again also very clumsily executed, but I also think the US should have finished what they started as in the final analyses, the US bowed to internal pressures, not external ones. However, note that like Iraq, I only consider Vietnam wrong from a pragmatic and not a moral perspective. The world wouldn't have become poorer if the Vietcong were defeated.
GamezRule said:

at Japan being a fascist power. They were basically a left over imperial power from WW1.
No, they weren't. The Japanese royalty WAS a leftover from WWI, and it were Hideki Tojo and the Imperial Rule Assistance Association who took de-facto over in 1940 and turned Japan into a Fascist dictatorship.