Honestly it’s probably less him talking shit about her family because she’s dealt with the Gods enough to know they’re idiots and assholes, and more him getting the story wrong.
“No you buffoon, he didn’t strike Prometheus down with lightning, he chained him to a goddamn rock and had had a eagle eat his liver every day. Prometheus fucking WISHES Zeus had stopped at a thunderbolt.”
Diana is that person who get really pissed when people get facts about anything wrong and may the gods help anyone who misuses words or makes grammar mistakes in her presence.