Being the invisible child in the family?

Hi, I'm 17 and the middle child in my family. My family consists of four people: my mother, my older brother, and my younger sister. I don't get along very well with my siblings, and my relationship with my mother has always been difficult. I think my mother never really liked me because she beat me as a child and often neglected me emotionally. She never speaks to me unless absolutely necessary, which isn't the case with my siblings. I don't understand why that is, because I'm not a problem child. When I'm feeling down, I can never cry to her because she makes fun of me or sometimes even imitates me, which hurts me a lot. She often ignores me or doesn't pay any attention to me at all, which I don't understand and hurts me a lot.

Does anyone know how I can improve my relationship with my mother?

I would be happy if someone could help me. 🙂