HOAs effect the members living situation, so they have the potential to generate some real horror stories. But it just seems like a particularly dramatic version of "people with happy situation don't post about them online."

My neighborhood growing up had a HOA that just maintained a little shared beach. They had a couple rules for yards, but nothing too onerous (don't have someone stay in a camper in your front yard -- a rule we actually broke, but just for a weekend or so, family visit with not enough rooms in the house). Annoying neighbors will find a way to be annoying, reasonable ones will find a way to be reasonable, the HOA is just a medium for this sort of behavior.