Mom like to complaint

My mother used to be like yours. At that time, she totally drove me nuts. But as time went by, I figured out that it was her characteristic and as a middle-aged woman, it was hard to completely change herself. So I have learned to stand her. It is difficult, to be honest. However, she is my mother. And I believe if you cannot change the environment, change yourself.

you can tell her that life is about acceptance...there are a lot of things to appreciate than complain about :D my mum's like that and i can't talk to her about it but hey, your case might be different so goodluck :D