Well hey, you can't expect too much from a 30 hour VN compressed into a 5 hour anime.
For the record, C;H remains one of my favorite VNs of all time.
(looking at that pic.... I don't remember the anime artwork being this bad.... oh wells...)
In the mean time, wait for the 4th ";" series... ChäoS;Child
The art was pretty sketchy in that show. The issue with turning the VN into an anime, is that the best way to do it in a 12 episode run is to just pick one girl and follow that rout. C;H didn't really pick any girl, and that would be fine if the other events that happen to the main character were at least a little interesting... but they weren't. He was caught up in a whirlwind of stuff from the get-go, and to me, he never figured anything. Even his cliched "epiphany" in the final episode didn't seem genuine, I still think he hadn't figured out a damn thing lol.
If you have more time (24 episode series), you can do what Kanon did and touch base with everyone but only maintain 2 or 3 "main" love interests.