You've burned too many bridges to torch another one on October 22nd. Although this situation is different – you really were misled and have every right to feel betrayed and angry – you'd only wind up torpedoing your credibility. Walking out now looks like a repeat pattern to anyone thinking of hiring you in the future, and that could make you box office poison in your own industry. You have to prove you've got what it takes to honor your commitments and see things through to the end. Once done, you'll be free to go your own way if that's still what you want to do.