If it helps as a reference, the criteria for a bad pizza is listed on the napkin in the bottom left! When the Pelp moderation team sends you messages, it indicates they don't consider the pizza incorrect.
Your boss doesn't like this pizza joint, so he's helpfully configured your phone to only post 1 star reviews! Your task is to look for mistakes and post a bad review if you spot any. Otherwise, just toss away the pizza and receipt and you'll be able to move on to the next entry.