The low opinion people have of the APA probably stems from the rules which limit the number of good players and encourage sandbagging.
Which comes back around to the point that if the number of "good players" wasn't limited, the number of beginners would evaporate, as the bulk of them wouldn't want to stick around getting their brains beaten in. It is a league that is supposed to be accessible to beginners, first and foremost. There are FAR more unskilled players in this country than "good players", so the APA was rather shrewd in marketing it's league to them.
The sandbagging issue is everywhere, in every league, and is celebrated amongst the "real players" as part of the hustle. If people pay attention, keep score properly, and report problems, sandbagging is limited. APA doesn't encourage it. People who don't mind cheating will do that wherever and whenever possible, regardless of the venture.