Please don't send your War and Peace manifesto to the Board of Directors.... or publish it on Social Media. Here are some steps to channel your anger and feelings of betrayal into a constructive solution that helps you.
Civil litigation won't repair your life, but the damages (the money) awarded at the end of a case can help to make you financially whole again.
You've just been fired and have a lot of pent up energy and anger. How to use that productively is key.