Has it gone too far?

So here goes. My stepdad is emotionally abusive. He critiques every little thing about what I do, what I look like, who I hang out with, you get the picture. I can't do anything without having one of his snide little comments thrown at me. For the most part I can tolerate it or ignore it, but lately I've been lashing back, putting up more of a fight. He gets really angry and calls me really degrading names. He calls me slut, bitch, whore, and he constantly tells me to go to hell, and to get out of his house. It's times when he does this that make me feel helpless and alone. There have been a lot of times where I've considered suicide, or self harm to show him how hurtful he has been. For a long time I've just wanted to scream at him "FUCK YOU!!! YOU'RE NOT MY DAD!!!" Ive cried myself to sleep more times than I care to recount over the things he has said to me. I try and talk to my mom about it but she just tells me I'm not doing enough around the house to help out. This sucks, but it's off my chest now.