The article is interesting but it just adds to the long list of erratic, megalomaniacal behavior by Musk that I assume most people here are already familiar with.
My uneducated guess is that he's mentally ill. Some sort of chronic mania or psychosis, perhaps as a result of bad luck but perhaps as a result of drug use or severe, long-term sleep deprivation. Then even in his lucid moments, he's the bad kind of perfectionist (the kind that can't bear to have flaws) and too proud to recognize that he has a problem or that he made a mistake.