disappointed by something/or someone

The thing or person that disappoints me the most is my mother. She is always getting on my case about every little thing I do or say. We are always fighting and yelling at each other, and she keeps giving me chores to do around the house. Even though I do them she still yells at me for no reason. It seems like ever since I turned eighteen she doesn't respect me anymore, and she's always keeping me locked in my house. I feel like I don't have my own life and that really disappoints me a lot.