An employee's main goal should not be to serve the Department Head. The Department Heads should not be serving the Office Manager. There should be a team focus on the project and on the client. It's also important to recognize that, in a growing, thriving business, employees should strive to serve each other and their own personal growth. It is not always easy to be self-effacing and humble.
Disappointments are inevitable.
Deal with them positively. Instead, learn from the experience. Make sure everyone within the organization knows and understands your business philosophy. Assemble your staff and explain in detail the type of business you want to nurture. Put your thoughts down in writing, and give everyone a copy.