This guy was an arrogant, condescending jerk. (Rush). When one of his own engineers severely questioned the safety of his design, he fired him on the spot, and gave him 10 minutes to gather his things and vacate the building.
He hired based on diversity. Not based on knowledge, and the best qualifications for the job. He was repeatedly warned by other people with far more experience than him in deep submergence, that he was making too many shortcuts, and taking unnecessary and dangerous chances.
He was also told by engineers with far more experience than himself, that carbon fiber was NOT sound material to be used in this application. And that by using it, he was placing himself, and his paying customers in a very compromising position that risked their, and his own safety.
He ignored most everyone who told him anything he didn't want to hear. Now he's dead because of both his stubbornness and arrogance. He got what he set himself up for.
I have some sympathy for the others. In spite of the fact they should have known better. There were a lot of people making plenty of noise about this guy, and his methods.