Everything doesn’t happen in life as per your wishes and anger is the obvious sequel. Anger needs to be controlled else it muddles your mind losing clarity just like boiling water losing transparency so inherent in clean water. Angry state of mind loses the ability to make sound decisions as the mind is controlled by anger within. Anybody provoking anger within you is at an advantage since he has managed to provoke you into an angry state of mind. Don’t allow anybody to control you else you shall be making decisions you will have to regret rest of your life.