Life is not totally fair. It is like a soccer game. Unfair play is a part of our life. We can meet it anytime while we are living. However we have to accept it. Showing anger about it is not a good idea. Losing your temper will give you more troubles. Relax and just concentrate on your life.
On the other hand, life is unlike a soccer game. Life is much longer than a 90 minutes soccer game, and the penalty of unfair play is much harsher. Therefore committing unfair play would not be a good tactics for you. Just go on a right route and enjoy it.