My understanding is Mandela was a respected leader who was willing to play ball and facilitate a peaceful transition where the white leadership got to keep all their property. That's why there's still massive economic inequality in SA today. Not to say Mandela wasn't admirable or that he didn't suffer, but it was a conscious choice to avoid outright military conflict at the cost of preserving an implicit racial hierarchy.
To me, the peaceful transition is the achievement. It is the amazing part of it.
South Africa also has affirmative action.
In fact, there are more race based laws in South Africa currently than during Apartheid.
https://freemarketfoundation.com/race-law-in-south-africa-30...
Now maybe you're talking about violent wealth redistribution. That generally doesn't work. It results in collapse and everyone gets poorer.
Zimbabwe bring the prime most recent example.
If you say that you are going to take large amounts of other people's assets, there is no way to run that process and not have huge amounts of corruption.
The problem has been: very high crime, heavily mismanaged infrastructure (Eskom is collapsing due to corruption, ANC politicians were taking tons of money from contracts), no investment in education, and so a population with no skills. I am not sure what wealth redistribution fixes...it has been tried repeatedly. It is like people thinking that a $1m loan from your father turns you into a different person...no, most people will end up wasting that money too.