What happens next?

How to escape extreme pressure employment
Come to grips with the fact that you can't take it anymore.
The lower you've hit bottom, the higher you will go. Consider stopping caring about your work/colleagues criticism and you might feel more relaxed in the short term.
Richard templar says in the rules of wealth act as if you don't need the money and people will no longer have power over you. Believe, from deep in your gut, that you can do better.