all transformers movies range from B+ to A
whatever this score is measuring, there's clearly a slant towards movies that are enjoyable for their entertainment value
these films aren't exactly uplifting, but were marketed correctly
gone girl: B
eternal sunshine: B-
nightcrawler: B-
but it does seem like the worst thing you can do is misleading marketing
unbreakable: C
eyes wide shut: D-
Cinescore is pretty easy to grasp.
It's people going to see the film and basically, is it what they expect? As someone said, Transformers scores high, but the people going to see it know what they are expecting. Movies like Unbreakable, Eyes Wide Shut. I don't think it's what the audience expected. Hence a more negative opinion. It's why a lot of terrible films still get decent cinescore ones. The people going to see something like Tyler Perry, which I do think most of them get an A, know what to expect. The target audience likes it. You can have depressing movies too, but the audience has to know that going into it. You can't blind side them, otherwise you'll attract a difference audience which is going to be receptive of it. This is a fault of the marketing from either studio or producer/director input.
Basically, if a film wants to do some sort of bait and switch, they need to do it extremely well.