I can totally relate to this! I was abused physically by my younger sister and I had a hard time standing up to her. She beat me up regularly and bullied me daily. I felt very inadequate growing up as a boy and ended up having such a low confidence as the result of her abuse. I was bullied all the time at school, including by younger kids as I was an easy target. I still think about it and feel very ashamed about it. People’s reaction was that I should stand up and shouldn’t be such a sissy, which made it worse for me.