Coaches changes, players are traded as pieces, and yet so many find ways to change, adapt, and contribute.

Jimmer hasn't.

I think his biggest issue is that he hasn't figured out how to be a role player. It is all or nothing with his style of play. And sorry, nobody is going to hand over the rock to him and let him go at it. You have to earn that right first and actually succeed as a role player in many cases first.