He gives up his body ALOT. He usually ends up on the ground when he drives and all of that contact is likely going to be what eventually injures him and robs him of some of his speed. He's talked about being more careful this year.

Otherwise, his whole persona is just off. It's like yo, why are you so bitter?

Some other great players have this whole "nobody believes in me" thing going on to motivate them but few wear their insecurity so publicly.