yes but there are other narratives:
Jimmy sabotaging his team because he likes Joe better
jimmy telling Kadary that he won't start next year
I agree with some of your last point. Personality clash and not the right fit for everyone and time to move on
However you want to spin it, the buck stops with the head man. Call it a personality clash if you like. He recruited the kid. If he deserves the praise, he also deserves the scorn.