He was wrong on December 7th when he didn’t prepare the Army Air Force in the Philippines for a possible attack, and wrong about taking the Korean War so far north that China intervened, but he was a great general and a great American. He was incredibly right about Vietnam when the Best and the Brightest were so terribly wrong.
The only commander in the Pacific who was not fooled and totally prepared for the Japanese was the Commander in Chief of the Asiatic Fleet, Admiral Thomas Hart, he lost none of his fleet and engaged the enemy with hardly any losses at all.
That statement is completely false.