Why do so many white people disagree with Affirmative Action when its helped black people like me get ahead?

Because it Affirms that not everybody is equal in capabilities, talent, ingenuity level. True, we are equal in the eyes of the law, but that doesn't mean that we, are all born and created equal in our abilities. Affirmative action negates that. It lets the untalented, the incompetent get to where they want to be simply because of AA. So people who are not even deserving to be in a certain positions gets there because of the color of their skin, which is a double whammy, because it insults colored people who have real abilities.