I had a read up on that US Admiral who was very anti British, it said he was but no real reasons. Must have been from his time serving with / on British ships.
Actually, from books I've read, the Americans were more anti-colonial British and had different ambitions for the Far East post WW2. I suppose the Empire was dead.
For example, British policy on Hong Kong probably interfered with the greater US ambitions for China. This US-British tension preceded Pearl Harbour!
On the troop ships, Lisbon Maru was a British tragedy. Those who do the HKG-PVG run ( 29 57 00 / 122 56 00 ) is her resting place. 2000 British POW's were aboard. The tragedy was the torpedoing by a US submarine. What happened afterwards was murder by the Japanese. The locking down of the ship as it sunk, machine gunning those on deck, rescuing those in the water and then murdering them. Another disgraceful act by the Japanese - and I have to say they got off lightly in war crimes trials!