I don’t think there is a major US corporation where shattering a glass in anger in an accessible area would not get a guy fired. Try it at your job and see how it works for you if you think it is such a “lame ass” complaint.
I don’t think that place is a major corporation. That dude is a prima donna with a history of egotistical outbursts. He was their #1 guy, the guy they hoped would build the network. They knew what they were getting when they hired him. They put a potentially $50 million package together to lock him in - an obscene amount of money for guy who just got canned and probably couldn’t get any other decent job (the $50 million may have been hard to attain, contingent on ratings, but put out to make him look good and make the network look well financed, but that’s a different story). Guys like that can break glasses.
Reading between the lines, I would guess - and I admit it is a guess - that they got in over their heads, and while he probably is a jerk that nobody wants to work with if he brought them the ratings and the money they expected they probably would have put up with his behind the screen (and some on screen) antics. But the ratings never came, the money never came, and that probably made him impossible to work with. So the word gets out among those who want him gone, document everything. And so they do. “slip and fall hazard”, seriously? Laughable.