I don't know. I kind of think this is a situation where really no one is to blame, chances were taken to appease the star, chances that usually made sense, and they happened to not work out.
I go down the line and see a lot of revisionist history. People did want Bud fired. They also wanted Griffin fired. They wanted Dame. They wanted Turner.
The only thing I think that would have changed the trajectory of things was retooling the roster immediately after the championship when Middleton had value but was still sort of an aging asset. Of course, that sets Giannis on fire, but he and Lopez should have been dealt then, or at the latest, the following year. Portis was a dumb signing too. The cornerstones should have been Jrue and Giannis, and they needed to get younger everywhere else. That's not a realistic criticism though.