It sounds like you are on the cusp of becoming independent from your parents. When parents have been dissatisfied with us on a regular basis there is a disconnect between who we are and what is acceptable to them. While this is natural in many ways as part of normal development the intensity of this experience can create the feeling that “no matter what I want or do it won’t be right.” The resulting frustration with this ongoing dissatisfaction generates anger.
My guess is that as you are launched into college life your feelings of independence and acceptance by others will change and self-acceptance will follow. When you get to the university I would encourage you to take advantage of the university counseling center if you do not feel a positive shift during the first semester. The counselors there will be very used to helping freshmen navigate these new experiences.