Company A is a joint stock company established in 2019. It consists of 4 partners from the same family. While the company operated for a year, some disagreements arose after a while. The aim of the...

Company A is a joint stock company established in 2019.  It consists of 4 partners from the same family.  While the company operated for a year, some disagreements arose after a while.  The aim of the brothers to gain superiority has adversely affected the company's activities.  One of the partners has hired a new purchasing manager.  This purchasing manager was not able to harmonize with other departments and it was a waste of money and time for the company.  What are the main mistakes in the failure of this attempt?