I'd give Fault 7/10 I liked the two leads, they did a great job, I didn't feel sorry for them. Also there is a saying or something about never meeting your idols, cause they will inevitably disappoint you, so I really liked how the author was a total asshole.
There was a few bits that I wasn't too fond of, however they were little things I'm not gonna dwell on. Overall, despite the sadness, I found it entertaining.
edit: sorry for the late review