I Am Frustrated

I have a huge problem with my mother's parenting and general character. She REFUSES to work. She also REFUSES to do any and all of the things that she is expected to do as a housewife (cooking, cleaning, raising my brother and me). I can't remember the last time she cooked a meal for the family, cleaned a single room in the house, or did anything other than complain about my father, brother, and me. She relentlessly insults my weight, despite having been 300 pounds herself (she got weight loss surgery because she lacks the integrity and willpower to diet and exercise, and instead chose to financially burden our family). She assumes that my father is having an affair (when she herself is cheating), and so many other bad things. I hate to sound disrespectful towards my own mother, but she is genuinely a bad person and parent.