I am sure your parents would be quite upset to hear you say they have a fuck-up for a daughter. They love you.
When I was going through my really bad times, I expressed about the same to my mom. My brothers are all doing well (older bro had some hard times but is just amazing now...successful and happy, younger bro has just always had it going on) and my mom, a strong person, showed the sadness on her face, that I felt that way. She told me how much they love me, and some wonderful things about being her daughter and her partner in crime concerning artistic and political sensibilities.
You are a human, who is going through a rough time. You are coping, though it might not feel that way to you all the time. Don't be your own worst enemy.
It's going to feel so good to you when you come out on the other side. In the meantime, absolutely you should write exactly how you feel, here where you feel safe to do so. But you know there are those of us who are going to say "yeah, but you DON'T suck!"
