Listen to the Stinker Madness Episode
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When it comes to the Christmas Flop, there's not too many floppier than 2006's Deck the Halls. I could be the groan-inducing jokes, the two one-time (and future) A-listers with their careers on the skids, or the really cliche and played plot. But mostly it's just that you hate the characters and want them to explode in a ball of fire.
Both of these men are horrible people. Which works great in a forum like Always Sunny but not so much in the yearly family outing at the movie theater with the cousins from Des Moines. Both Steve and Buddy are completely unlikable from the start - frame 1. You can't do that. When you have this plot (Dads take things too far!) you need at least your protagonist to be both likable and identifiable so that when the dads shake hands and treat each other with respect at the end, you have a location to return your character to with the viewer. This doesn't have it. Steve's a dick at the beginning and middle and end.