He once accidentally bullied one of our younger waitresses out of an early eating disorder she was developing before working there (she told me about it after)
Boss gave us one meal from the menu a day as a job bonus, and we had this very shy seventeen year old working with us who was already nervous around men, but Our Guy was a 6'3 dude who only stopped yelling and cursing when he was not speaking at all. If he was the one cooking that day, he'd peek out of the kitchen an hour before he'd start closing it up, and would shout at you if you haven't ordered your meal yet because he hated cooking once he already cleaned. The waitress was scared shitless of him, and so whenever he would yell at her to "fucking order already", she'd panic and just pick something.
She didn't eat much but the first time she tried to throw out almost the whole plate, he got so personally insulted that he berated her for not picking something she'd like, and demanded to know what he did wrong. He got really upset about apparently not being able to cook something that this kid would like and I'm pretty sure he started putting in extra effort to make sure she would eat it this time? It lead to him quite literally standing over her like a hawk when she ate to "see her reaction" and demand an immediate review to see what he can improve.
She later told me that it she was so scared and awkward around him back then that it kind of overrode her fear of food, and that she still sometimes pretends she's back there, when she feels a bad episode coming on, so. He did do something good for the world i guess