There is a burgeoning sub-genre of Christmas film: the anti-Christmas film. In these movies, the protagonist is generally set up as a Christmas hating low-life in the first act, does something despicable in the second act, and, often after a Christmas-spirit revelation, makes amends in the third act.
Examples of this kind of film include The Ref, Scrooged, and Bad Santa. The latter is a particularly raunchy example of this sub-genre, including reams of humour so base that it would give Bacchus himself an infarction.
It's a charming film, as these tales of deadbeat redemption often are.