It isn't the answering machine... it is the fact that a lot of people and businesses use them as a passive-aggressive cop-out where messages stashed on them are never returned. This is so common that people automatically assume getting an answering machine means to try calling back again.
As for frustrating answering machines, the ones that try to guide you by voice, cannot figure out what you are saying, then say, "please try back another time" are contraptions from a lower circle of Hell.
However, I wouldn't want to have this **** in the same sentence or paragraph as most RV parks. Virtually all I've interacted with do check their voice messages, so I do my part and leave a clear number, repeating the message to ensure it was received properly, especially on newer cellphones with worse call quality than the flip-phones from a decade ago.