Is it normal to think my mom is a tramp?

Very slowly, bit by bit, over the course of my life I have come to learn to truth of my mother's character. She has lied to her children, although many of her peers knew the truth: she's an unwed mother who "accidentally" got pregnant. Twice. She then felt this entitled her to own my Dad's house which indicates she targeted him for his success (which is also widely known by her peers). She's selfish, competitive and jealous of her own children. She is a pathological liar. She refuses to do basic things for her children such as cooking, teaching life skills or giving affection. She is always primarily concerned with whichever current boyfriend she has. These boyfriends never need be concerned with her children or attempt to be a family man. As long as they are taking her out or buying her gifts she's thrilled. She is high strung, insecure and weak. She copies things I do, wear, eat, say and acts like we are the same age. She does not take responsibility for her life or her choices. She was physically abusive when we were young until we each had enough: my brother hit her back, I moved in with my Dad and my sister also hit her back. She used to have half-day long sex marathons with her 20-years-younger boyfriend, moaning so loud we would have to leave the house to avoid the sound. She cusses at us, is insulting and is completely unsupportive. She makes nothing but empty promises, is always hours late for any appointment, is ignorant and uneducated. If she weren't my own mother I would call her a whore. I hate her and intend to completely remove her from my life. She's not the kind of person I even want to know at all. I don't need the frustration of watching her trainwreck of a life.