My impression of the American WWII myth is based on more recent Hollywood dramas, which can be quite grating on British nerves. I accept completely that this doesn't reflect the historiography, and I also accept that wartime films have a propaganda element to them which will of course emphasise what the home nation is doing. I'm reasonably well read on the war in Asia, and I'd never belittle what the US did there.
I'm just fed up - offended, if you like - by the constant lazy references in some circles in the UK to the 'fantasy image' of 'British heroics'. All nations have their national myths, and while the British one tends to edit out imperial troops, there's no shame in emphasising that we did stand up to Hitler, and that the Battle of Britain was a very courageous feat of arms, and so on.
That was the basis for my comment.