Again, J.T Miller is not this headstrong, give-it-all-you-got player who wants Petey to do what he does to win.
Even Miller's coach is sick of his shit. He's lazy, he's bad defensively when he's not trying, and he is a bad teammate.
Don't confuse Pettersson's dislike of Miller for someone who is mentally fragile.
If you kept getting called out for stuff that the person calling you out for does on his own accord, you wouldn't want to be around that person, either.
If you can get Petey, go get him. There's a difference in allocating 12.5M+ to a winger vs 11.6M to a center.