If you want to obtain all of the trophies, which some of us do, you're forced to play through the multiplayer. Surely, that isn't exactly the right way to go about it in what is predominantly a singler player game.
I hate the multiplayer because it is overly simplistic. It's not very different from the likes of CoD, and in a game that contains infected, leaving them out of the multiplayer shows just how little time they actually spent on it. I could've thought up this multiplayer in 5 minutes... As could most, if not all of you.