Your contract has this weakness: "an affirmative vote of the Members holding a majority of the issued Units". Instead of a majority, it should have been "100% of the issued Units". In your set up, any group holding 51% of Units can change whatever they want.

This is why you need a special contract, with special voting rights for your shares to prevent collusion esp when you are the key person.

The only answer here is to consult an attorney, and I would be highly skeptical of any specific legal advice given to you with so little information being presented.

Founder disputes, especially this early on, can be nasty. I'm very sorry that you're going through this.

What do they other team members do? Did they actually build any of it? Did you sign an IP agreement?