Good for you setting boundaries!
I am the one sober person to come out of generations of alchohlics. And my mom,(the functioning A) did everything for everyone. Her life was sucked dry. And when she died the family expected I would fill her shoes. When I told them I wouldn't, I never heard from any of my family again.
And when I told my brother to stop trying to run my life, he stopped talking to me.
If people react negatively to you when you are making rational requests or statements, then family or not, you are better off without them!