He did answer in #114.Also 4th time what did she do for work in the past?
I still don't get OP's logic w.r.t leaving her in order for her to improve. I mean he says that he loves her, but he's ready to bolt.
Either this isn't the complete story or OP hasn't explained all of it well. If he's just unhappy and can't tolerate her, there's no need to sugar coat it.
If you love someone, you stick with them and guide them even though they're an idiot. She would be better with your guidance than without.