Mother's mental health. Over here.

My mom always be shouting, doubting on everything, stubborn to the things, she will get anger unnecessarily, she will smile very rarely, she will enjoy nothing. Always busy with cribbing and poking. we are from a descent family background. we face many embarrassing situation in front of others. About her back ground-She lost her mom at her 14yrs and faced many humiliations with her brothers and sisters (as per she said). (As per my dad my mom's mother was behaving wiered at all no moon days and her dad used to beat her). We tried with many doctors, my mom has no acceptance, and she not taking medication properly. she says what ever she do is right and others are wrong. She doesn't believe anyone. We are facing many problems out of her behaviour. I am facing issues in my marriage, and my brother newly married just 6months back he is also facing very worst situations in front of his wife. I hope I can get solution over here.