Those are all management decisions. Again, no one on this board knows exactly how the Harden trade went down, but let's assume KD demanded they get Harden for him to hang out with. They still have a management decision to make there. Appease the star or do what's right for the franchise. And KD is right to judge the management on the outcomes of their decisions.
They could have opted to keep a quality team around him and let it play out. If they win a title KD's happy with or without Harden there. And if they don't and he wants out, I mean, that's the business. I just don't see this as some sort of personal failing that guys want the freedom to change jobs. If the league wants to start imposing some sort of penalty for this behavior, I'm cool with that. Any contract can be broken. You just have to pay the penalty for doing so.
I'll just say KD is not out here dogging the Nets. He doesn't have his reps doing that. He just has put it out there that he's ready to move on. This isn't Kawhi faking an injury and bashing the team that nurtured him from a draft night afterthought into a superstar. This is a guy who has played hard everywhere he's been and never cheated the game. He just wants to hoop and he wants to enjoy hooping. Nothing wrong with that, imo.