I think your mother may just want you to learn to be independent, take care of others and hone your patience. Your mother probably just wants you to get used to this life in advance. One day, when they are old or sick, you can stand alone. When I was a child, she was by your side every day, year after year. For you, she spent most of her life as a free nanny. Did she complain? You should understand her. If she wasn't like this before, you should pay attention these days. Maybe she's in a bad mood or hiding something. You should care more about her, communicate with her more, and don't always complain, so that she will feel that you will be impatient when she is really sick or can't take care of herself, and you will not be with her. You should let her know that you care about her and love her. You may not be good enough but you will study hard.