My pick for most hated webcomic:
http://www.pholph.com
Jack has insane amounts of comic-busting idiocy. Artist self-inserts himself as a "Godly" character (Is Satan in the first NIN tribute comic), long and excruciatingly drawn out "arcs" like Suffer and One Way To Win, POS artwork, though that's more a personal gripe, 1 or 1.5 dimensional characters, extremely stupid potty humour in the "outtake" comics, and of course a mob-like fanbase. This of course gives him a superiority complex where he thinks he's one of the greatest things to grace the internet.
If you want to jump straight to the worst of it, go through Games We Play In Hell. Oh yeah and one of the evil furries is a near carbon copy of Violater, but really pathetic and uncool.
Runner up:
http://www.exodus.virtualgeneration.co.uk/
Larf and cwy at the total misuse of Poser....not like any of its fans know how to actually use it anyway. This is outstanding mostly because you can see there's so MUCH work put into a vile putrid turd. Especially if you check out the forums, where she talks about how she does this stuff. (I forget where that is since I haven't been here for a month but the forum isn't too big anyway Should take all of 5 minutes to find it.)