To be honest, the review doesn't say much about the park, except that they couldn't find personnel when they got there, some sites looked like they hadn't been used in a long time and that it looked like long term stays.... but that is not really telling much about the park. I see nothing to substantiate a "terrible" rating. What made it terrible? Did it look like a trailer park with a bunch of old trailers, broken down cars? Was the grass real high and need cutting? How were the facilities if any?
Just remember, every one has an opinion. People will stay and like parks we won't ever set foot in...if the reviewer has a good track record (you can confirm by having been in places they have been), then you might be on to something.