I think he got upset that she stepped in front of him to block his way before asking her question. He took it as disrespect and made the excuse to leave.

Even developers, who are among the most tech savvy users

Doubt

I have owned 3 G203 mice (never again) and they have all failed the same way, with the left mouse button switch failing and causing double clicks/inability to select anything without resetting.

Quality must depend on which model you get.