So Tanzania,Kenya, Rwanda, Ghana, Togo, Botswana, Seychelles, Mauritius etc. don't exist?

At the end of the day, South Africa was always a basket case. Massive defense industry trying build Peacekeeper missiles and Apache type helps. Dumping the majority of your population into a racist totalitarian hellscape. The economy only worked due to resource extraction that used a massively underdeveloped and overtaxed majority controlled gybe totalitarian state.

As much of the above economic superstructure has not changed, one can hardly then expect the basket to become a bucket.