I think you are completely misunderstanding the ANC. A democratic party since its founding in 1912. It was never going to create a dictator. The situation in SA was very very different to that in the colonial frontline states.
There were many political parties in pre-liberation SA who were 'like' Zanu-PF - the Maoist PAC/APLA being the largest - but they were never embraced by mainstream South Africans black or white.
I don't think I'm misunderstanding the ANC. I'm actually recognising its achievement.
What I'm saying is that the context in which it operated was potentially volatile, which could have led to a much worse outcome than actually happened.
The ANC had conflicts with Inkatha, which ShotgunGold refers to, with many deaths, and it was fortunate that those conflicts, largely between the Xhosa and Zulus, didn't worsen.