If several people witness the same event and report about it, everyone will tell a different story. That happens naturally and the stories complement each other.
People listening to these stories are gathering different aspects of the actual event. They learn about it from different angles and viewpoints. This is the concept of completion. However, with competition there is only one story representing the ultimate truth, all the other ones are neglected.
Within the concept of competition we want to be the one with the best story. We might even argue, whose story is more true, more interesting, which one is the absolute truth.
Competition can also be encouragement apart from contest. But what is encouraged? Well, it is about outperforming the other one and we call it success.
Basically, all of it is only a game. There is nothing wrong with playing the game, if we have a choice whether we want to play it or not. However, through our programming we are more or less forced to play it. Let us become aware of such programming in order to be able to release it and be free in our choices again.