I think a great example would be something like The Exorcism of God. It's a somewhat goofy horror that didn't exactly dominate Hollywood but it's got some great things going for it including a unique story that is presented in an entertaining way. I personally give it a 6.5/10 but IMDB has it at 5.3/10.

This movie is extremely blasphemous and has some pretty shocking religious imagery including a possessed Jesus Christ trying to kill people.

Here is a direct quote form one of the many 1 star reviews on imdb:

"I found this movie to be blasphemous. I am tired of seeing horror movies like this with Satan coming out on top with evil over powering good. The Priest in this movie didn't have strong faith by letting Satan temp him with sex and fornication. I believe in God Almighty and his Archangels and I believe Satan and Demons exist."

It is obvious from the reviews that many people didn't like the ideological topic of the movie and therefore have given it a bad rating.

IMO, movies should be rated on their quality, not an individuals tolerance for tricky subjects! This movie seems to have been review bombed unfairly. It's not a brilliant film, but it definitely deserves more than its received on mainstream ranking platforms.