You are forgetting MacArthur’s conduct of the 1941 Phillippines campaign. He should have been court martialed for it.
-He blithely assumed his enemy would not attack until the Spring of 1942.
-He failed to follow prewar plans and stockpile supplies on Bataan and Corrigedor. For that matter he did not move supplies in earnest until the Japanese were almost to Manila!
-His inaction in the hours after learning of Pearl Harbor contributed to the loss of over half his Air Force.
-He truly earned the name “Dougout Doug” by staying on Corrigedor and only visiting Bataan ONCE.
Had MacArthur been hit by a bus in the summer of 1941 and Wainwright been in charge, the Philippine-American forces could have held out longer and done more damage to the Japanese. This would have helped the allies by disrupting the Dutch East Indies and subsequent campaigns.
Don’t get me started on his getting ambushed in Korea by forces he already knew we’re there!
Read his withdrawl from Bataan to Corregidor. Considering the Homma, the Japanese commander, thought he had MacArthur's army cut off due to a series of pincher moves, MacArhur outfoxed the Japaneses Army that were supreme in numbers and resources.
He wanted to stockpile weapons and munitions for Bataan and Corrigedor but was not given any help from Washington. They assured him that supplies were on their way. They never came.