I absolutely guarantee it's because he's pissy. He's the kind of guy who, as long as you pander & praise him he's generosity itself but it's always a transaction to him - if he feels like it's not enough coddling, he'll cut you off without a second thought.
Even though I also came close to believing him back in his heyday, he never actually wanted to fix the energy problem. He just wanted to be known as the guy who fixed the energy problem.