Apart from the rare example, there's nothing wrong with the standard of the people who referee in SA. (There are a number of people who shouldn't be refereeing but are due to the state of the situation but that's another issue.)
The problems are 1) there's not enough people willing to referee and continue to do it and 2) mismanagement. #1 is somewhat resolved only when #2 is.
Starts all the way from the NBL level down. SA refs are pushed up before they're ready, before they are at the level necessary and for reasons which have nothing to do with their ability.
That in turn removes them from the level they should be refereeing, meaning someone else not yet ready has to be pushed up the system.
This continues all the way down to Sat Mornings/Domestic basketball where it also happens.
In turn, these referees get more abuse for the blatant mistakes they make and quit. The cycle continues.
It starts at the top and all peak bodies are to blame. We need to stop blaming the referees when they're as much the victims of this as the players, coaches and spectators are.