[brudgers]

The appropriate multiplier is zero, because in this case it is time to leave and move on - there is no repairing the rift in the relationship; both sides see the other's position as outrageous and assess your role completely differently (hired help on the one hand and cofounder on the other). Finally, there is a significant difference between a small business and a startup when it comes to how closely the owners expect to hold the company (as you have discovered.)

Hindsight is the right word, because it's time to put this in the past.

Good luck.