On paper, “ Oh. What. Fun. ” has the makings of an attractive holiday feature that encourages Prime Video subscribers to click play: Michelle Pfeiffer leading a company of instantly recognizable actors directed by a notable filmmaker, a heartfelt story about the harried holidays from the vantage point of an egregiously underrepresented POV in the genre (mothers) and a soundtrack littered with festive songs covered by musical artists with household names. However, director Michael Showalter ’s yuletide anthem for unheralded matriarchs fumbles severely, delivering bland comedic hijinks, insufferable characters and generic conundrums. It makes audiences wish for the slightly darker version simmering beneath the surface, instead of the one with a Norman Rockwell-esque, shellacked sheen a

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