This was my take as well. The guy was working 12 hours a day 7 days a week, with the fate of the entire project on his shoulders it's no wonder he turned in to

This was my take as well. The guy was working 12 hours a day 7 days a week, with the fate of the entire project on his shoulders it's no wonder he turned in to 'Mr. Hyde'. Management should have stepped in long before it got to that stage.