First bolded: What? Cleveland led the league in wins with LeBron one season, and made the Finals in a different season. They absolutely put him in a position to win a title. They just didn't get it done and he didn't want to stick around and give them more chances, even though there's a pretty good chance they would have gotten it done in the next few years. And when he left he didn't go to the place he thought had the best chance of putting a winning team together. That would probably have been Chicago. He went to one of the glamour destinations (one of just a handful in the league) so he could play with his buddy and try to build a superteam. That is what I'm saying is the new phenomenon, and it's bad for the league.
We've covered this so many times already, but

You're crazy if you think that Cleveland team was put together well enough to win anything, and the results bear that out. They had a shot at impact players - not Jamison or gimpy Shaq - but didn't pull the trigger because guys like Parker and West were untouchable. Maybe that's what LeBron dictated, but either way they ####ed up and eventually landed themselves in cap hell as a result of their bad decisions. They land Stoudamire instead of Jamison, he's probably still in Cleveland and they probably have a ring or two to show for it. So LeBron left. Learn from that and move on. But that's not on the players, that's on the bad management decisions. It's that simple.
What about the case of Melo? He straight bolted a situation that was far superior to that in which he ended up. Look at how the Nuggets are being picked through post Melo. Nene is the hottest free agent in the class and will end up with a huge contract, its likely that Afflalo will be gone as well as the highest paid wing in free agency. They drafted well when they had picks (traded many of them away for veteran talent), they made fantastic trades (turning Andre Miller into Allen Iverson, turning Iverson into Billups, A 2nd rounder for Afflalo, two 2nds for JR, Camby and Nene for a broken McDyess the year before he was drafted), they've picked handfuls of legit talent off the scrap heap (Anthony Carter, Dahntay Jones, Chris Anderson), they ran the organization nearly as well as it could have been run making only one mistake I can remember in the entirety of the 00's (the Kenyon Martin deal instead of Ginobili). Other than the year the Nuggets made the finals (and Anthony Carter ####ed them),
many of the teams problems in the playoffs that kept them from advancing were Melo's fault. What does the organization get rewarded with? Melo giving them the finger and forcing his way to NY (which the Nuggets did a fantastic job of negotiating). There is hardly any hope for NBA fans that don't live in big markets. We'll see what happens to Durant when his current deal runs out, but the only superstar that has stayed put for his entire career was Duncan, and even he looked around and I believe almost ended up with Orlando (I could be wrong, but it was somewhere).