I do like dark/bleak comedies, but this just takes too long and does not have enough to tell. Don't get it twisted, this is not a family picture nor your typical Christmas movie, which I all knew going in and you should too. The story does not just happen to be around Christmas time though, it's supposed to be that way, to show us what happens behind close doors and the other side of Christmas (see also Neighbors and their "way" of celebrating).
The humor is not lost to me, but the message is not sufficient enough to warrant the running time. There are a lot of long pauses that are supposed to enhance the "message", but only succeed in stopping the movie in its tracks. The performances are good enough, but the characters do not have much to say other than the central message. A few nice set pieces (see Neighbors) are not enough to help elevate this. There are worse movies, but this misses out on a couple of things too