It is a tough place to be. He seemed to be headed in the right direction prior to his knee injury, then things that goes beyond his control puts him in the position that he is right now, so it's only fair to me that he looks to get back on track to where he was going before - also I argue that athletes wanting to play, and to deliver big, show the competitiveness that made them good at what they do in the first place, and not seeing it that actually should be concerning.
How he handles that from now on, including extra setbacks, not just of injuries, but other guys surpassing him after he takes a starting spot (if he's able to do it, of course, a big if), or a trade for a guy that would send him back to the bench, that's on him. But so far, I'd say he's shown at least interest in listen and working on things that he's told he needs to do. He may very well fall short of competition and requirements not just for the Jazz, but for a NBA starting spot as a whole (could he start for a team like the Bucks looking to move Jrue to SG ? I guess he could fit well there. But how many more places would be a good spot for him ? Maybe the Magic i guess, but not many other franchises), but seems normal that he wanna dispute it.