There is balance in the universe. Goodness, as well as evil, can’t get so powerful that it can take total control. Otherwise there would be no challenge to life, and that would defeat the purpose of living.
As you become a better person, your negative side will increase to maintain balance. To keep you challenged as your soul becomes better, the bar gets raised even higher for the trials you will face in your life. Your purpose is to overcome those challenges. You can do it, or you would have no reason for being here.