However, the movie runs into a few problems on its way to grow the Grinch's heart three sizes. It takes detours that don't help portray the lesson trying to be taught by the original story. The Grinch, written by Dr. Seuss, was about a green-haired person who hated Christmas and overcame that hatred when he found out that the holiday was about caring for one another instead of gifts. This movie decided that they needed to add a backstory for the Grinch which overall made him less mean. There are multiple instances where the Grinch is nice, which makes his change seem inevitable. They also add a subplot for Cindy-Lou to have a bigger part in the story but make her motivations too mature. A ten-year-old would not ask Santa for their parent to become happy; that would be too unrealistic in a movie with a Christmas tree the size of a mountain.
If the Grinch is just a lonely person, why wouldn't he change at the end of the story? If he is nice all the time, why wouldn't he give the stolen presents back? The movie hinders itself by making a ton of gags in place of substance. So I had fun watching this movie because of all the silly jokes, but I can't overlook how the story didn't feel right. I could never buy all the "bad" things the Grinch did because he was never terrible. The movie "How the Grinch Stole Christmas" from 1966 is the better animated movie for adapting a classic right. Sure, it has too much motion blur and its not as good as the 30-minute tv-movie from 1966, but at least its almost Christmas season.
"It wont make your heart grow three sizes" - Anonymous