All I can offer you is what helped my wife through a similar situation a few years ago. She was working for a small summer theatre festival in a small town, away from me for 4 months. The Director she was working for had some sort of mental snap and became unreliable, spiteful and paranoid. It was my wife's job to produce the Director's vision and provide for the welfare of the cast and crew. It became impossible. How do you reason with someone who is unreasonable? How do you deliver what isn't planned for? To top it off, the Director began accusing her of incompetance, and bizarrely, a conspiracy with the Board to undermine her artistic reputation.
She would call me in tears nightly feeling completely alone because of some new accusation or insult. What helped her through it, was the realization that the Director was entirely a force unto herself. All of her wild accusations and erratic behaviours were self created and did not reflect upon my wife at all.
If a crazy asshole treat you poorly, his or her insults simply don't hold any water. You are above them and outside of them. All you can do is watch the shitstorm spin around and around in front of you without fear of getting dirty.
Not to be flip (really!), but maybe you can find some humour in this. Pretend you're the saloon piano player while these two idiots are having an old western style shootout and brawl. You just keep on playing that ragtime like a madman while the bullets, bottles and chairs fly around you. Provide the soundtrack for their own self destruction!
Put a calender up on the wall, mark off every day that passes and keep counting until you get to leave. Besides, look at all these happy people who are counting down with you!
