Every player wants 1. money, 2. fame and 3. rings, and probably in that order if you got an honest answer from them. Kyrie probably feels he's maxed out on money. He's won a ring. But in a lot of ways he hasn't ticked box number 2 nearly as much as he feels he could. Not everybody is happy being Scottie Pippen. I don't blame him, really.
I really wish LeBron would just take a series of one year contracts on various championship-caliber teams. This year Portland, next year Boston, the year after that Houston. Just announce he was the ultimate NBA hired gun. He'd make just as much money, and he'd have his jersey retired everywhere. It'd be awesome every year speculating how his current team matches up against Golden State. GS would be a yardstick for his greatness.
Eh, I can dream.