As full-timers, we traveled constantly and we used public parks which allowed only 2-week maximum stays. There is constant movement in those parks and they draw vacationers and weekend campers. It's a more active place to camp as folks bring their families, fishing rods, boats, games, etc.
So your question must be referring to reviews on certain RV parks. There's quite a difference with RV parks where you can rent long-term. Those parks attract folks that consider the park their home and they don't move. I wouldn't consider them full-timers. That is just their home. They are most likely still working or are raising there families. Some RV parks don't have strict rules or don't enforce them so then folks have a tendency to accumulate 'stuff' and a lot of it is left outdoors - just like living in a house. There could be more vehicle noise because of folks leaving early in the morning to go to work. Parks with workers or just permanent folks tend to have those folks staying more to themselves as opposed to a public park where people are friendlier and think nothing of stopping by to chat.
So when you read a review on those kinds of RV parks perhaps it was written by a weekender only there for a few days and not knowing what the park is like before he arrived it was a disappointment because to him it seems more like a permanent-type park rather than a travelers park that he was expecting.
I don't think the reviewer thinks of himself as better but instead he expected a more weekender-type park - just a different environment.