The main problem seems to have been the ego and narcissist pettiness of one man, ceo of OceanGate, Stockton Rush, pilot on the ill fated dive (because no one else in their right mind would do it), who insisted carbon fiber is a revolution in deep sea submersible engineering, when everyone else, as well numerous hull failures during testing, were telling him otherwise. In truth, he was likely just a cheapskate, as appropriate deep sea submersible materials, such as titanium, are far more expensive. Basically, he sugarcoated his greed and illusions of grandeur as some kind of revolutionary, altruistic breakthrough that will enable your everyday Joe to plunge into the deep, believing in it against all common sense and basic science. Dozens of employees who saw red flags were either promptly fired or resigned due to safety concerns. Check out the Netflix doc, it’s interesting.