She had some sort of dementia which is sad, but I could not comprehend how she had been a superhost with Airbnb for years. That is, until I left a review of my experience and Airbnb promptly deleted it. I'll stick to hotels from now on. As far as LA apartment hunting goes I still think I made it out unscathed.
Oh, also I started shorting $ABNB shortly after this experience and it's almost made the whole thing worth it.
Edit: It feels really good to finally tell someone about this. It was so bizarre I'm too embarrassed to tell friends or family.