When your parents think you're weak because you talk to them and try to deal with your issues with therapy and they think that makes you weak. They accept it in your sisters because they have diagnosed mental disorders and you don't even though your doctor says you're depressed, you definitely have ADD and OCD, major anxiety issues and probably some learning disabilities too. But because you want to deal with your issues you're weak. They don't even see your strengths because they're too worried about your sisters and they treat you like you can't take care of yourself and they refuse to tell you anything. They think you're weak, even though you're really terribly strong, and refuse to help you grow.
Not that i'm speaking from experience or anything