The worst film adaptation I’ve seen is “Anne of Green Gables: The Continuing Story.” It’s not really an adaptation; more like poor-quality fanfic that imagines Anne Shirley moving to New York, where she finds fame and fortune at a publishing house (I believe; I had to stop watching about 30 minutes in). I can see the temptation to enliven the story a bit, because the Anne series is so domestic in its focus (and what small-town kid doesn’t love a New York City sojourn?). But hearthside bliss is L. M. Montgomery’s whole point: As an orphan, Anne’s desire is to find a permanent family and she does this by having her own, not by working for twinkly-eyed, big-city publishers.
Y.S. Lee in “And the Next Tin-Tin Is…”, a survey of YA authors on the best and worst film adaptations of YA books

Source: