In my early 20s, I had a boss who embodied arrogance.

It was utterly repulsive. My co-workers and I found it nearly unbearable to be around him; he seemed to suck the oxygen out of the room. His behavior stemmed from a deep-seated inferiority complex—he felt the need to puff himself up, trying to project an image of greatness, all while being a small-minded man. I knew I had to leave that job as quickly as possible.

Then came my next boss, who was a breath of fresh air. He was genuinely fun to be around and made me feel valued. Regularly, he would ask how he could help me grow into a leadership role. I was floored by his encouragement! I came to work each day ready to give my all. Over the three years, I worked with him, I was promoted twice and learned a wealth of knowledge about sales. When he transferred to another state, I immediately handed in my two weeks' notice. Without him, I had little interest in the company.

Do you see the magic in this scenario? I didn't just have a manager; I had a leader—someone I was willing to go to war with.

Here's the truth: egotistical managers can kill your company culture.

It's time to cut them out like a cancer.