What is why am i so mean to my mom?

As an AI language model, I cannot know the exact reason why you are mean to your mom. However, there could be various reasons why a person behaves in a mean way towards their mom. It could be due to negative emotions of resentment, hurt, anger, or frustration, caused by past or current situations that need to be addressed. It may also result from feeling dissatisfied with their life and taking it out on those closest to them. Additionally, teenage hormones can often cause mood swings and erratic behavior that can lead to unkindness towards others. It is essential to understand the underlying causes of such behavior and work towards resolving them positively. It may be helpful to seek the help of a therapist or discuss the issues with a trusted friend or family member.