I’m guessing LuckyGungan read some unfavorable reviews (of which there are many and I understand why) and decided to change his score. Of course, the fun could have worn off fast after the film was over leaving him with a changed opinion.
A bit of both, actually.
You should avoid letting other people’s reviews alter your opinion much on a movie.
I do try, but so much of the time I’ll read or watch a review and go “oh yeah, he’s completely right, that was in fact bad/good” Lack of free will, perhaps.