Accident -- a Pou-Soi Cheang film
Like LawAbidingCitizen, this starts with the premise of a masterful killer who arranges deaths. Since he arranges fate, he slowly goes nuts as he sees meaning in everything, and the film spirals down to its mercy-killed ending.
While visually fun, these scripts need an overhaul. What happens when you have a razor-sharp paranoiac mind that does this one thing well? Instead of these films always ending with the killers getting served a big helping of Death Cake, imagine that they survived to old age. Would they keep killing? Why? How much heart does it take to not just end people who cause you any trouble?