How does a pretty young minor tell their parents about how much of a horrible person they've become, because of the minor's family?

How does a very young minor tell their parents that, one, they have no feelings for anyone else but themselves, except for hate for their mentally abusive, stuck up, petty, and manipulative older sister, that has a mental disability and excuse her for it, letting the minor slowly despise them, and had to get hurt at a very, very young age from that same older sister, and have very strict dad that also hurt them at a young age, helped make them the horrible person they are, and acts like their feelings don't matter, and also believes the older sister, but also doesn't, letting them getting hurt over it, and doesn't take responsibility for it, and, two, the minor that has barely any feelings for anyone, is a sadistic, masochist, a person who has a kink for rape and murder, torture, a narcissistic, dramatic, obsessive, disgusting, dense, manipulative, self-absorbed twit, gets sick kicks out of having an argument, cut themselves just to get back at them, makes them believe that they're suicidal because it's funny, and so they get more attention, and then gets more addicted to the pain, doesn't know who they're supposed to be, wants to be suicidal so they can just pass away and leave, and not hear their dysfunctional family gripe about themselves, the minor, and how much of an annoying person they are, that they purposely didn't tell them these things because they're are minor, and just wants to watch them all die a horrible death, even though the minor knows that they can't handle them dying, then they fantasize about their family, and themselves, dying, just to imagine their amazing, horrified family's faces, words, and actions, just so they can pass the time?

I know I'm disgusting-- and pretty dense for dumping my problems on you--But, I really need an answer. Please. Take it as you will--but I'm not lying. Please. Try to believe me. I feel like I'm going to explode. My urges are getting worse by the day. I just need someone to talk to that isn't a therapist my parents have to waste their money on. Please. I want someone who doesn't dismiss me just because my age. I just want to say everything I'm feeling-- this isn't even the start of it. Please.

/r/Advice Thread