He wasn't too bad in that he prevented a civil war in South Africa. But he did not handle the transition very well. The country is barely holding on. But it could collapse any day. Other African countries including Botswana are doing better economically while South Africa is stagnating.
One party rule by ANC is the main problem. So far, they're holding back from genocide. But watch out when that happens.
Sure, sure, that's the main problem. LOL.