Perhaps that was your experience in High School. My own was that after High School and four years in the Air Force I went back to college. When in basic Biology, Chemistry, Physics, Calculus, etc, people would say “Wow, where did you learn that?” I would say “A little place we liked to call High School.” But then again I took all college prep courses, and I guess they worked as advertised.
Why did you have to repeat those classes in College? Why couldn't you have just done your undergraduate work when you were a freshman in high school? In fact, why couldn't you have just gone straight from Jr. High to college?