Have been in that situation. If you leave, you're done. It's up to the other co-founders if they want to throw you a bone to keep a relationship in place. The leaver is dead to the board and the investors. It's your business now, move on.

is it tho? like i agree if i just took the equity. but if i own a ton of equity and the board wants to clean up the cap table, don't they still need to deal with me by offering me a fair number instead of "just moving own"?