I abandoned Yelp as a user pretty quick as it was just too much to filter through so many reviews by people who 1) Had some one off bad experience that is probably not representative of anything. 2) Wished that place they reviewed was like some other place that is kinda the same but ... it's twice the price so why are you comparing?
The number of people who clearly had no idea what they were signing up for was always amusing to me. Example, if you go to a hole in the wall taco joint, you're going to get greasy tacos served on plastic or paper plates. I mean, it's not fancy, but they're also $1 each. By complaining about that on yelp you're just showing off your silliness, not providing anything useful to other potential customers.
Over time word got out and its reviews stabilized as their pizza and ingredients are top quality. But man for a while it was all just some idiots who just wanted some dominoes like pizza.