I’m wondering if he had a bad interaction with one of the girls socially or if one them reminded him of a woman he had been rejected by at some point. From all indications, he was incredibly socially insecure, was referred to as “creepy guy” on one the local bar’s POS systems, and had been bullied during high school. It sounds like he wasn’t exactly well received by women at all. I think you combine that w/ a book smart, arrogant individual who wants to show the world how smart you are and he finally snaps that this is the disastrous result.