No doubt MacArthur was a prima donna. But he had the lowest casualty numbers of any Allied theater commander of the war. This was by design. Early on, he decided to jump over Japanese strong points and let them wither without further supplies.
He was appalled at the way the Navy ran their island-hopping campaign and the way they burned through marines. I have always had to agree with him.
When asked after the war who they thought the best American general; more than one German general/Field Marshal immediately said MacArthur. If I recall correctly, von Ruendstedt thought this.
It was his father who won the Congressional Medal of Honor in the War Between the States. His father was also the Governor-General of the Philippines. I believe Douglas spent time there with him. It should be remembered that MacArthur was a contemporary of Churchill and was born on some frontier fort in the 1870's. I think in New Mexico. He had retired from the US Army and was working for the Philippine Government to try and help develop a military force somewhat along the line of a national constabulary, as I recall.
No doubt Truman was correct to relieve him of command in Korea as MacArthur was insubordinate.
MacArthur was very popular among the Japanese when he was the Supremo there after the war. He made a big show of his movements in Tokyo with motorcycle lights and sirens.
Later when there were rumors that he was going to run for the U.S. presidency many Japanese rooted for him. There is the old joke that one saw lots of signs in Japan, "Praying for General MacArthur's Erection." I trust the reader gets it.
Americans were often less thrilled with his ways. For example, among some of the enlisted men he was called, "Dugout Doug" supposedly because he was a coward. This is nonsense. In no place have I ever read anything even hinting that he was a coward. In fact, he was often reckless in battle and one place I read that a shrink wondered if he was subconsciously tempting death.