Brother doesn't like mother and sister. What's the intention?

Because my sister has many bad habits, my brother will know what's wrong with my sister after reading it. And generally, my brother doesn't like my sister on the surface, but he still cares about her.

Many times, I still can't understand my mother's painstaking efforts. I always feel that many times my mother is in charge of him and should not educate him. So I hate my mother, but he doesn't know that the society is very complicated now. Mother will try her best to educate him so that he will be less injured in the future. What kind of mother doesn't care about her children, but the children are too young to understand their mother's thoughts, so they misunderstand her and even hate her. When he finds it later and walks into the society, he will gradually understand that his mother's education was right.

Maybe my sister cried when she was young, didn't study hard at school, didn't pay attention to dressing up, and spent money indiscriminately, which brought trouble to my brother and family.