Fighting your ego - a continuous struggle with yourself?
This is what modern society teaches people for their work: You are good if you are the best. You are good if you are the number one. If you are in the higher range, your ego gets artificially boosted so that you perform even better, bringing even more income and profit to the company.
People act as though they were humble and in this acting they have a big ego of being the most humble persons of the world. They really think that nobody could be any humbler than they are!
People usually cannot accept when the other person is different than in their imagination. It is ego. It sounds childish but if you are honest and have a close look at your actions, it is a common attitude in adults, too.
Ego is the main reason for separation.