This movie shouldn't exist. It stumbles through it's awkward dialogue and dark jokes with this unbound optimism and unexpected lack of cynicism that ends up really having you along for the ride. It provides really genuinely funny moments as well as deeper realizations about humanity both specific to the characters as well as broader themes we can all appreciate.
I have to go back and watch it every year or two and everyone I've shown assumed I was pranking them before they eventually got into it and loved it.