That's the danger of identity. He sees himself as the good guy being made victim by countless greedy ill intentions and he "won't stand for it." So he could never step back and gain the necessary perspective. Instead he dove in to stand up for himself, with this aneurysm of hope that he could strong arm enough people to change their mind.
I guess a parallel could be drawn to medicine. This guy named Paracelsus once said that everything in the world is a poison if you get too high of a dose. And Zach probably thought well of who he is without realizing the nasty O.D. of himself he was giving the world. He was far too clouded to notice how toxic he's been. So, poof goes the career.