We had one like that in the Lassen Volcanic park cg. Our fridge wasn't working on propane so we had to run our honda generator during generator hours. This women made three or four trips to the CG host to complain. The host came over to talk to us and I pointed out we only ran it during generator hours and didn't do that most of the time since we were away from the CG most of the time.
I went over to talk to the woman and she was completely unreasonable, she expected complete quiet while in a CG. I should have told her to go Boondocking but she finally just packed up and left.
People like that are very rare, that's the only one that sticks in my mind from 40 years of camping. Camper are almost all the better sort of people.