Mockney
Not the only poster to be named Poster of the Year
The original manga was a masterpiece, it's very intellectual and challenging to keep up. They'd be hard pressed to make a mini drama out of it let alone a 2 hour movie.
Much of the thought processes are much more clearer and elaborate in manga where they took time to really explain what's going on. I guess something just arent meant to be made movie.
I can definitely see how something interesting could spring from the premise (though the whole "influencing people for 48 hours" thing seemed like a massive contrivance tbf) but as you say, the lack of any breathing space or nuance just rendered all the decisions either nonsensical or outright hateful. I presume the characters in the manga aren't supposed to come across as completely unsympathetic sociopaths? Though even that could've plausibly been somewhat intriguing if treated properly, rather than as some bafflingly awful emo romance.