I don't think that's correct
There was massive tender fraud and numerous contracts were cancelled iirc
But let's say you are right. That's 1 out of 9
I'm not saying that the ANC only did good.
A person can see the good without having to point out the bad. The DA has had many annoying mess-ups in Cape Town too (But many more successes).
I'll repost what else I think the ANC did great
Averting the debt default we were close to, and then reducing the crippling debt we were in.
Dramatic increases in GDP (PPP) and GDP per Capita (PPP)
Dramatic reduction in poverty
Brought inflation under control
Increased our trade partners dramatically
Add in a big increase in our healthcare which was dismal prior to '94 (Remember effective healthcare is a combination of reach and quality. The increase in reach is dramatic, but quality has gone down a bit in places).
The automotive industry has also been a very successful addition to our economy