Granted, there's it's a little ironic to warn parents against raising a bitter child by doing XYZ in terms which seem pretty bitter, given the ACh feels he's avoided that outcome.

However, I think it's a mistake to lecture too much on the hubris of calling people morons. ACh is expressing his frustrations, from his perspective, and warning parents that their kids may experience the same.

Working (or learning) with people who can't see nuance, who expect everyone to think the same or who cannot see the glaring fault in a given strategy is frustrating for anyone. Repeat that experience and multiply it ten-fold and you can relate to ACh's experience.

Telling him he shouldn't feel a certain ways is no answer to his warning that our own kids may feel that way regardless of our views on how things 'should be'.