Why don't you automatically assume the dude has an amazing personality? If women are selecting men mostly based on how great/not great their personality is?

And why aren't you happy for her, nabbing such an obvious personality prize?

Why are you assuming she's with him?

I've seen women do this in social settings, in public, at a restaurant, etc... when they see a mid or ugly looking dude with a particularly beautiful wife/girlfriend. There might be scoffing, comments, or their disgust is shown more subtle ways: Women in your group will make eyes at each other and their little faces scrunch up. Maybe a sardonic smile.

(I do think women are generally more superior operators in social situations, but one thing they are terrible at is hiding their disgust/controlling their body language related to such).

You also see this a lot online, when a good-looking female celebrity gets a new boyfriend, and he's just average looking, or god forbid ugly. Women express so much frustration at seeing this, like they want to pull their own hair out. It's funny because these female-dominated celebrity gossip spaces on Reddit tend to strongly align themselves with social justice and being anti-body shaming. But they just can't help themselves in this situation, it's like they're witnessing a genetic crime take place, and they have to call it out.