I've had plenty of dustups in my business career.
Some of my most bitter ones came over equity sharing. Been on both sides of the trenches. Fought like hell to protect my share percentage. And fought like hell to carve out a bigger equity piece for myself.
Let me tell you, prying equity loose from a going concern ain't easy. Many years ago, I ran a global trade and financing business. I was selling product for a local Maryland company in Indonesia and found out that the business I brought in accounted for 80% of their global sales. And that their global sales accounted for 80% of their total revenue.