Stepmom question

Is it bad that when I move out I don't want to see my stepmom? I don't associate with my birth mom and don't want To. I don't need a mom. My stepmom pretends to be my mom and then always brings up my birth mother and throws her in my face. Almost every day she's telling me I look like her, or calling her "your mom" which gets to me worse than anything. She's constantly giving me dirty looks and picking fights with me and my dad. She has this attitude like she knows everything and is better than everyone. She's been married to my dad for 10 or 11 years, and for about 7 I've been telling My dad to get away from her. She doesn't seem to understand English even though she's lived in America her entire life. I've posted about this before and someone told me I was "driving a wedge" between my dad and her. I think my dad is cheating because he wants to get away from her. She told me once if I got pregnant before I turned 18 she'd make me get an abortion and I think since then we've had problems. I never did get pregnant, but she's always threatening to hit me and I'm 3 times her size so it's really just annoying. Honestly, she's just stupid. I know that's mean but she understands very little. So when I move out I want to get away from her. Is that bad? I mean it's my choice but I'm kind of biased against female authority and I personally don't want a mother nor do I want someone pretending to be my mother. One of my friends actually said it bothers her too that she tries to pretend to be my mom. She calls me her daughter but then brings up my birth mother. How does that even...?