No matter what happens to you, your attitude belongs to you. Your attitude is your choice and responsibility. The more you know who you are, the less you let things and people upset you. Don't allow someone else's attitude make your life miserable. Those who try to criticize and speak ill of you are expecting you to be angry and be in a fight mode, conquer them with your peace.
Hold yourself in; you have self-restraint, don't fight back, maintain your inner climate. The less you respond to negative people, the more peaceful your life will become. We would enjoy life a lot more if we get good at knowing what to ignore and what to focus on. You may miss out on God's best for you while being distracted by things that don't matter. Remember, your attitude is your responsibility!