Is it normal to wish your parents were dead?

I never do anything wrong. Sometimes I say "friggin" because they aren't tolerant of actual swears. I say it once at the dinner table, and they're like "enough with the friggins, you've said it 6 times now." So them and I get into an argument when my dad finally screams in my face "GAVIN, YOU FUCKING SAID IT! NOW KEEP YOUR MOUTH SHUT AND DO AS WE TELL YOU YOU FUCKING ASSHOLE!" Being the pretty boy I am and my dad being the tough, muscular firefighter he is, I start to cry and run to the bathroom. They continue to bother me and taunt me and toss me around like they're tough shit. Almost 3 times a week, we argue back and forth. I am suffering from moderate clinical depression, and their motherfuckery is not helping. I go to therapy and I'm always the one who has to change in the end. I'm to blame; I'm in the wrong, everyone should hate me, blah blah blah. I can't leave the house and live on my own, or live with someone else. I am stuck with them until I'm well enough off and every moment I spend away from them is a blessing because if I were always around them, I'd have punched one of them in the face. I can't take this shit anymore and I'm breaking down slowly. I go to bed with headaches and too much on my mind every night. What can I do?