I've been in this same situation as you. You can and will not win against your boss. You can either try to transfer into another group outside of the reach of

I've been in this same situation as you. You can and will not win against your boss. You can either try to transfer into another group outside of the reach of your current boss, or you need to leave. But the fact you are on performance review means that transferring might be very hard, unless you've made good relationships with other groups that would take you on. Those are your only two options so act quickly. There is no way so salvage the situation. 30-day performance reviews are really just a way to fire you but to avoid a lawsuit. I find it hard to believe you will be blackballed in the entire city unless you work in a very small city. But you have no choice. And next job you get, you should consider the things you say and who you are saying them to. Some people take criticism well, and others like your boss will try to fire you. Learn from this experience.