McNair
Because the desperate coach's job is not to develop, but to rather win. This isn't an OKC situation where Presti fired the coach and hired a completely unproven new coach to match the arc of his team.
From day one, I felt the Kings should tank. But I'd much rather they tank like OKC than to tank like this. OKC has Dort, Bazely, Roby, SGA, and their kids all playing alongside rental vets like Horford and Hill. They're losing, but they hard and are developing. If McNair had any balls, he'd fire Walton, trade Buddy, cut CoJo, and cut Bjelly tomorrow.
I thought for a brief moment that the greatness of Hali would make this a treadmill team with soft as butter vets, but I rescind all treadmilling thoughts. You can't fix the composition of this team.