I too have suffered with anxiety and depression since early grade school and now am working with a therapist for me PTSD. As a child I banged my head on my pillow at night and side of the mattress by dat. I could cry thru a whole day of school.When my brother beat me my father punished me for crying. My brother became an alcoholic and I dumped him out of my life.If your brother is a narcissist he will never believe he did anything wrong.Get him out of your head. I've been in therapy 6 times in my life and I'm 68. Don't be afraid to go to a psych for medication. If you get angry at your parents or brother that's a good thing , you're on your way. Be exceedingly kind to yourself. It's a long journey back. Be very careful who you allow into your life.Exercise, take long walks in nature, cut out sugar and get enough sleep. Don't take on any caregiving responsibilities. It's all about you now.Remember it's not the destination it's the journey . There's a lot of emotions to work through. I wish healing for all of us.