I don't want to plan on taking care of my mother in the future
Why do you not want to take care of your mother in the future.
I hate her. She has kept on criticizing me all the time.
Even if you don't want to be directly responsible, you should still plan for your mom's future care. It ensures that there will be a plan to take care of her later as she gets older.
She can suffer. Why should I need to care for her?
Your mom doesn't sound like the nicest person, but you could give her some lee way. Try to help her out the bare minimum and see if you can make arrangements for others to look after her.