How can the problem of a girl who is thinking of suicide and hates her mother and invokes curses upon her be solved, due to her mother's mockery of her and her overweight?

The mother's behavior mentioned is strange, but she remains a mother who has the right to dutifulness and kindness. There is no blame upon you for the hatred in your heart due to her actions, as it is not something you earned. However, wishing for her death and supplicating against her is not permissible and is considered an act of disobedience and a major sin that requires repentance.

It is recommended to be patient with her and supplicate for her guidance and righteousness. Suicide does not solve the problem; it increases misery and carries a severe warning. Obesity can be treated by seeking Allah's help and consulting specialists.