I don’t know that South Africa has gotten as bad (yet); the blacks were begging the whites to stay in South Africa, as without them they literally had no schoolteachers, doctors, etc.
I believe that is why more whites in South Africa are better off than in Zimbabwe; the black ruling class realizes that without them (at least for the time being) the country is doomed. The events on their northern border can demonstrate that for the black ruling class in SA better than anything else could; Zimbabwe’s problems are spilling across the border, and black South Africans are beating the immigrant horde back.