Sometimes guys get sick of their pretty wives IF that wife is a total witch.
Like the kind willing to put up a photo of her exes new girlfriend or wife and say isn't she ugly? Does she even compare to my pretty ass?
Yes that makes you a total cunt.
He left for the other girl probably because your pretty face was tarnished by your blackened burnt hole where your heart was, if you ever had one.
She is most likely sweet kind loving caring and compassionate. All the things you are not. So stop wondering why he left you for someone you see as subpar.
It's simple. She isn't subpar, not where it counts. Where it really matters, you are actually subpar.