Must be those white genes dumbing them down. Pure Africans are the demographic with the highest academic achievement levels here in the US. Even still pretty much every Black person graduated at a higher level than you did.
Black immigrants collect most degrees
"In a side-by-side comparison of 2000 census data by sociologists including John R. Logan at the Mumford Center, State University of New York at Albany, black immigrants from Africa averaged the highest educational attainment of any population group in the country, including whites and Asians."