Your question was quite clearly answered. See, that photo is a contemporary example of the San, AKA Bushmen. They are a group of people who for the most part have been left unaffected by European involvement on the continent. Still today they wish to remain hunter-gatherers and their traditional territory extends well into several modern nation's political boundaries.
For an example of European influence on the continent, I give you this:
Actually..it wasn't.
You posted a picture of hunter gatherers. They were on a continent where every one of their countries were colonized by Europeans. And not only colonized but forced to accept a religion alien to their culture and harvested as slaves. They were also introduced to a plethora of new diseases.
There is no telling what that sort of devastation caused. Especially given the
trajectory of some of the more advanced African empires.
That does not make them unique. Europeans were once hunter-gatherers too. They also had a religion foreign to them thrust upon them by the sword. Foreign diseases reaked havoc on the continent. And they were enslaved by other races. But they advanced and brought a great deal of good to the world in law, medicine, technology, etc.
The Bushmen are a fine example of a people left unaffected by Europeans. Another example could be the Maasai.
What more advanced African empires do you speak of exactly?
And ultimately, do you see European involvement in Africa as a net gain or loss?