Mine is that Discovery should have been a series taking place in the Picard era.
I’m not necessarily saying he was wrong (although his mission is a race to the bottom). And yeah, the victimization could explain his deterioration from a great man to a warped vengeance-seeking psycho. But as a character there was nothing interesting going on there. He’s just a generic Bad Guy, for the plot.
But I like your points. It’s nice to see some Khan appreciation!