Since you did not ask a question, I will provide a general answer. You can’t interfere in your parents’ relationship; it’s not your place. They will need to resolve these issues on their own.
You also can’t force anyone to get help even when it seems obvious that they need it. No one can. That is a difficult lesson to learn. People have to want to get help. If your mother doesn’t want help, she’s likely not going to get it. You could suggest it to her and encourage her to go but after that, realize that you’ve done all you can.
Your family members are ideal candidates for family therapy, but it’s not clear that they want help. If not, focus on what you can control; protecting your own mental health. That might mean limiting your interaction with your family. Other strategies to consider include moving out when you can and maintaining a strong supportive group of friends to insulate you from the chaos at home. Individual counseling would also be a wise choice.
If you have a more specific question, please write again and I will do my best to answer it. Thanks for writing.
Dr. Kristina Randle