GM's who bash owners don't get hired again. See McD for an example. You can look to other teams as well and see similar discussion we have here with regards to "ownership bad, GM along for the ride". This isn't unique and we really don't know what goes on behind the scenes. The constant is JJ underperformed under 2 owners.
Sort of bringing it back around to another post you made, we're in agreement once Ishbia took over but before then JJ did next to nothing. He didn't really make the bubble team. He literally gave away TJ Warren right around the draft, traded down for Cam Johnson (who was tied to Bowers, which was the assistant GM showing JJ the ropes), and he signed Rubio as a FA which allowed Booker to excel as a SG. Ayton pees dirty game 2 and we're now shorthanded at Center for 25 games and our season is cooked from jump. He doesn't do anything to improve that team. Play suspends as we go pandemic and Monty makes it clear he needs another PG as Rubio didn't have a backup. Monty suggests Cam Payne who he had a history with from time in OKC and Payne comes back from China to light up the bubble from the bench and credits his relationship with Monty for the 2nd NBA chance.
That summer Paul is out of OKC and makes it clear he wants to reunite with Monty while playing with Booker in Phoenix. JJ does it get done but Paul did the work for him by publicly stating Phoenix was where he wanted to be and having OKC's cooperation to make it happen. We gave up Oubre, Rubio, and a pick. JJ doesn't need to draft, good for JJ. Good move but he also lets Baynes leave which puts us back where were when Ayton was suspended with 1 real Center. We're a bad drug test from 0 centers for 50 games. JJ doesn't make a move, lets it play out. He let too much play out here.
JJ was someone initially hired to repair player relations there's been a plethora since he's been hired. Ayton's drug test, Oubre being scratched from the bubble team, Crowder issues, Torrey Craig leaving and return, Frank's leaving and return. That's all pre-Ishbia and if it doesn't fall on JJ then why has similar things happened since our ownership changed? I'm not buying it's on Ishbia and Sarver. If nothing else JJ has allowed it to happen and hasn't done anything to repair the relations he was supposed to.