No team halfway smart will trade a superstar player for a bunch of trash unless that player is old, oft-injured and on a gigantic contract. That's when the equation changes, or at least it's supposed to.
And it is never just about who is better, Mikal or Durant. Durant is better, even at 35, and even though he's not close to the player he was prior to the achilles injury. And he has a lot of value on the court even if we're struggling right now. The problem is, we traded players with reasonably bright futures for a year or two of a star player that will soon be among the worst contracts in the game. When you also throw in all those picks and pick swaps, to me you're paying top dollar for a player who already wasn't capable of "earning" his salary.