On one side of it people are just overdramatic and give in to hype, then exaggerate when their expectations aren't met.
But on the more reasonable side of things, a lot of people come from a time when games were just games, and everything that's become standard in gaming over the last few years has, to many, compromised the medium. When it was just about a company selling a game and us buying the game and that being the end of the transaction, that was gaming at its purest. Now that unfinished games, DLC, online issues, corporate PR bullshit and these levels of overhype and fanaticism are the norm, a lot of people hold a lot of spite. The people whom it bothers the most just leave, but those who stay because they still love gaming and want to enjoy it as much as they can (myself included) are often outspoken about the industry's problems, stuck in a limbo of tolerating yet hating what the medium has become.
tl:dr -- The internet.
Currently playing:
Bloodbath Paddy Wagon Ultra 9
