This. Sometimes we vote at the ballot box, but more often we vote with our dollars. The publisher is more interested in keeping our business than keeping you.
Josh, let me explain Capitalism to you. Sometimes people decide not to do business with you. It's their decision. You know the whole "No Shoes, No Shirt, No Service" thing ? In your case it happens to be "No Principles, No Honesty, No Book" thing. Feel free to Self-Publish