Dungeons that go on way too long

I've been enjoying playing Mary Skelter 2 (despite all the weirdness) but this game just goes on WAY too long. 46 hours played and I'm at chapter 6.

This is after 5 large dungeons each with 4 to 5 levels each. I like the layout, the puzzles but the game really could be done by this point and I wouldn't complain. The combat is okay but the boss fights really come down to luck and RNG.