Not Yelp, but pretty much every PC game that uses some minor form of copy protection, connectivity etc. gets slammed on Amazon. Because, you know, one minor feature destroys the whole game, which is critically acclaimed elsewhere. The console versions may not get the same treatment.
E.g. Grand Theft Auto IV:
Xbox 360 - 4 stars/5.0
Playstation 3 - 4.5 stars/5.0
PC - 2.5 stars/5.0
On Metacritic: PC 90/100; users 5.6/10
Diablo III PC:
Amazon - 2 stars/5.0
Metacritc - 88/100; users 3.8/10
Almost all the 1 stars are because they don’t like one feature (Social Club). It may suck, but it doesn’t make the worst game ever, and not 55% of the quality. And qualitatively, the PC versions are otherwise the same as the consoles, except with better graphics, controls, and customization.
With some business, people are super critical. With some, the business is just bad. I always look at the specific reviews, and prefer ones that actually mention multiple aspects of the business. With auto repair, sometimes people may not like the price, and don’t care that they got good service. Sometimes they have a legitimate gripe. Auto places are one I am particularly careful with. Good front office and customer service are nice, but I don’t need someone to wow me if they fix my car cheaply, effectively, and timely.