I don't think I have ever complained to the management at a campground - which makes me wonder if I am the "people" that everyone else complains about! lol
I guess my biggest "complaint" about campgrounds is when they are not as advertised. If the campground has one tree by the office, it is not a "heavily wooded" campground. "Spacious sites" means you need more room than just enough to open the camper door. "Family friendly campground" means loud, drunken campers need to be dealt with immediately. "Pool" - means just that!! If the campground advertises a pool, then the pool should be filled up, running, and clean. If the pool is advertised as heated, then HEAT the pool!
As for on-site management, enforce the rules fairly. Yes, the seasonal people are supposed to abide by the campground rules - you, the management, need to make sure of that.
For people new to camping at campgrounds, management needs to take into account that they may not know all the rules, with an eye towards discretion including (especially) the "common courtesy" things that may not be written down that help to make a campground run smoothly. I've been in situations where the management has just been rude in enforcing rules - it is unnecessary, and leaves a very bad impression.
_________________________________________________________
2021 F150 2.7
2004 21' Forest River Surveyor