He screws up his face, unable to stop it, which only makes him wince harder and close his eyes for several seconds. She's literally talking about every single thing he hates thinking about right now. But why should that surprise him?

"Not agreeing with you and calling your ideas worthless are two different things, Page." Guess which one he'd snap someone's neck over? "...Don't call me that."

Frank slowly pries his eyes open again, knowing it came out petulant but he can't be brought to care. The alternative is talking about Matt with Karen after they almost... yeah. Let's bicker about his name. That's better.