And that of course is the reason, why you should get out. The movie itself is quite simple, no big story (though you will not fail to notice that this is quite the swipe at politicians and elections overall), it just is silly as it can be. That of course may not be everyones cup of tea. As is the almost unlimited amount of gore, violence and blood that is being spilled.
Whatever you think about those things will determine how you will enjoy the movie itself. Throw in a few things that nerds will love (from gaming references to other stuff that are a nice touch) ... Enjoy it and you'll have a blast (no pun intended), but if you don't abort as soon as possible, because the movie is consistent from start to finish.