If you found this movie, or any single scene in it boring, I really don't have words to describe you. This is single-handedly one of the most intriguing, interesting and gripping movies I've ever seen. Unbelievable. It's masterfully done. Simple. Objective. I can't comprehend a "0/10" review. What a shame you can't bring yourself to enjoy a fantastic movie.
So many movies have a dull section which loses the audience, but this doesn't have a single one. To expect a climax that's satisfying as compared to the real Zodiac case is ludicrous. You shouldn't get the satisfaction as no one involved in the real case did and this movie makes you so intrigued that you feel a part of it.
Superb music, acting, directing, writing, and incredible suspenseful scenes. The revelations between time-jumps were just great. I urge you to do research on the actual Zodiac case. It doesn't have a satisfying end, same as this movie. That is the point, and it's shocking that could be missed.
Thanks, David Fincher.