Nothing bothers a film buff like an uneven film. One can tolerate many shortcomings in a film, as long as it holds to some kind of intent without too many diversions.
Of course, Jingle All the Way (1996) fails in this regard.
In general it's a story about a deadbeat dad, Arnold, trying to buy his son's affection, then seeing the err in his ways and making amends (there are probably 20 episodes of The Simpons like this). The subplot about his rivalry with another bad dad (Sinbad) fits well with this theme; it fleshes out how bad of a person the protagonist is.
The film falls on its face is when criticisms are made about the commercialization of Christmas (what else is new, Arnold?), and then later retracted. Wishy-washiness spoils the occasion. The early critiques are meant to be obviated by the amends a father makes with his unhappy son. It's a strange take on the old "Christmas Family Magic" theme that doesn't nearly work, and doesn't really fit with the rest of the film.
Regardless, the movie is fun enough, and is nearly worth seeing for just for Phil Hartman's (and to a lesser extent Sinbad's) performance(s).