I think it was more the fact that his wife divorced him (neutral terms my ass) and all he has is his kingdom of dirt, he doesn't like his fanbase as much as people would think mostly due to the fact several of his projects died because it wasn't Minecraft. And he did donate a fuck ton of his earnings early on, now he probably sits in a giant house alone possibly getting hefty royalty checks until Minecraft finally dries up. But by that time he'll be set for life.
But look now that he stopped developing Minecraft no one cares or gives two shits about him anymore, and I don't think he even shows up to his cons anymore... after a quick google search it seems he's enjoying his billions of dollars. Riiiiight.