Audience scores on any entertainment website are pretty sketchy in terms of reliably ascertaining what “The general public” thought of a film - not just because gaming of those scores is so easy, but because absent any ulterior motive for gaming the scores, the self-selecting sample is hardly representative of your normal movie-goer anyway. Normal movie-goers typically don’t rate movies online at imdb OR rotten tomatoes after watching a film. The kind of person who does that isn’t just a tiny percentage of the possible general audience, but they’re a skewed tiny percentage at that, because you have to be a certain type of movie-goer to care enough about your opinion being registered online to even THINK of heading there after watching the film.
It’s part of why the scores are so easy to game - people don’t think of the scores at all, so when presented with the score, they just accept the number out of hand. People who game those scores know this. They can fake the number, and then fake the authority that number holds. Audience scores have basically become not much more than a stat to be used to win online arguments. They were pretty much always that, because more often than not the only people contributing were people inclined to get in those arguments in the first place.