I've got to say that a scathing email post-show will only be destructive. That is not a professional way to resolve your disputes with producers/theatres. It will only leave the theatre with an extra-sour feeling about you as an SM and make them more enthusiastic to spread the word about your "bad" SMing to other people. Just let this go. Get it out of your life. It's over. If you're ever asked, you can certainly be very frank about your terrible experience. Actively try to keep your friends from working there, just to save their own sanity. You might take the opposite approach and send personal emails to any show folks whom you got along with telling them that you really enjoyed the production, were sad you had to leave (in the case of a dismissal like this), and that you'd love to work together again. Work on maintaining the positive relationships you developed on each show, and let the bad ones go. You can't save a theatre from bad practices, you can only try to keep yourself away from such mismanagement. Behaving professionally will keep your reputation intact, and other people will see that the theatre really lost out when they mistreated a fab SM like you.