There's a lot of shit, but straight up lying about Aliens: Colonial Marines, assaulting his staff, withholding bonuses, destroying Duke Nukem, just generally being a greaseball,
https://www.reddit.com/r/pcgaming/comments/5gtbhy/eli5_why_does_everyone_hate_gearboxrandy_pitchford/
Doom Eternal: I just learned that minigun shield protects you from fall damage.