Surely apartheid was a socialist inspired system of job creation and benefit for the Afrikaner? English speakers and Jews were certainly not groups considered by the Nationalists to be further developed. 
A colonial legacy has no basis for the current state of the economy, since globally every other former colonial country would logically be in a similar position. 
Your view indicates that poverty only exists in capitalist states. Aspirationally in which country would the average South African choose to live if not here - communist utopia North Korea? Where do miners have a better quality of life - former colonial capitalist Canada or communist China? Where are government mass atrocities more likely to occur?
Terrible things have taken place in SA, but you may want to think more deeply about what system model has the potential to take the country and all its people to a higher level and become a major power.
No-one in SA has ever voted for the SACP - so who do they speak for?