Yah gonna tell me, that a bunch of African tribes not even actual Kingdoms if you can call them like that, who did not invent the wheel, and didn't invent any form of governance beyond tribal chiefdom are more supiriour then Europeans?

there was even one ruler who might still be one of the richest men who ever lived

still most of the continent was pretty inhospitable and sparsely populated for most of time south of the sahara until trade routes gained traction

Yes there were Kingdoms but there were relatively few and also not advancent.