What is the ruling on a partner taking a commission for himself in exchange for bringing projects to the company, and threatening his partner to increase his share, and what should the wronged partner do in this regard?

A general partner is personally liable for the company's debts, even with their private funds, unlike a limited partner whose liability is limited to the value of their share. This may explain why the other partner believes they have a greater right. The contract is the law of the contracting parties, and a partnership is a non-binding contract; either partner has the right to dissolve it if they deem the terms unfair.