What a truly traumatic experience for her to go through when she was younger she is clearly using class A substances as a way of blocking this out and dealing with her emotions
I understand it is incredibly difficult for you to watch your own granddaughter go through this and you have to protect your own emotional well being please don’t take her anger personally she is hitting out against those that tried to hurt her
I’ve been through addiction myself and now a volunteer support worker I don’t know what part of the country you are from but with your permission and hers and she must want to stop or it won’t work I can see what help and support their may be available in your area
I really hope she gets the help she needs and you get your granddaughter back to the person she once was