Uninteresting Characters & Dialogue

Rating: 5/10 (30 November 2017)

I wasn't familiar with this story or the solution to the mystery but I knew it was popular, so imagine my surprise when I found it so uninteresting.
None of these characters are compelling in any way. How am I supposed to care about this crime when I'm not made to care about the characters? Also, why should I care if the detective solves it or not, what are the stakes? If he fails, what happens? Nothing. This movie gave me no reason to care about the story or the characters in it.
Additionally, the movie was about 90% dialogue, which isn't a problem unless the dialogue is dry and uninteresting, which I thought it was.
If you like mysteries for the sake of a mystery perhaps you'll enjoy this one, but I found it rather dull.