Stephenson's stories of being selected and then deselected are dreadful. Talk about lack of sympathy. You've got to feel for the selectors, too; miust be very difficult to have called someone up up bas an urgent, panic stations, replacement and then realise you don't need them.
I had an experience, early in my working life, when I was asked to take over somewhere, found the paperwork in a mess, and sorted it all out. When a permanent chap was appointed and the boss found out I'd sorted out the paperwork he told me I needn't have bothered. Still rankles, sixty years later.
Racism's always difficult to deal with, especially as attitudes have changed dramatically (for the better) over the last thirty or forty years. "Acceptable" banter then isn't now. Look at the Black and White Minstrel show, or Alf Garnett in Till Death Us Do Part (etc).