I would assume he is just frustrated in going to a team that runs 3 point guard sets with over the hill bigs and plays ole defense.
I watched the whole game being stuck in Raptors land Canada and he is far from 100%. He's clearly annoyed, we've all seen it too many times.
Poor guy was bred into winning, it will probably take a decade to get some true perspective being he is so stubborn.
Plus, him, Derek Rose, they have the same problem. Reckless abandon with no attention being paid to landing going to the hole at a young age. His best days are far behind him.
Welcome to Vince Carter territory. They're all going to be disappointed with each other, surely.