If you can afford it, sometimes bailing is the way to go. I had to do that at my dot-com boom job when I started crying in the bathroom more than once a week. Oh man that was awful.

Unemployment was a bummer, but it sure beat hating life for 12-14 hours a day ("lol sorry, we didn't tell you, but yeah, this meeting runs till 10 pm, but you guys can eat dinner afterwards, right?")