I tend to forget the bad ones. Perhaps the only reason I kind of remember how bad Sonic Disruptors turned out is that it’s so rare a Big 2 limited series gets cancelled. The only comic I closed unfinished was the Paladin issue of Marvel Premiere. A Don McGregor script and Tom Sutton full artwork was buried under the darkest, murkiest coloring I’d ever seen. I might as well have been reading it under a cloudy midnight sky while wearing sunglasses. I also remember finishing a lot of nineties books that were all art and no story, and feeling extremely dissatisfied. I couldn’t name them. I could probably name some writers that spent their careers producing nominees for this particular dishonor, but there’s no point in getting into that, not with specific examples.

Essentially, for me, someone has to say something that triggers a memory, and then I can produce examples. Otherwise . . .

One that leaps to mind for me is Avengers #178, "The Martyr Perplex". Some raggedy weirdo shows up to the Beast informing him that "there's something in you that needs killing" along with some other psychobabble BS that for some reason affects the Beast. He spends the rest of the issue in naval-gazing until the raggedy guy shows up to someone else with the same dumb proclamation. On top of that was art (breakdowns at least) from Carmine Infantino that was far, far from his best efforts. Utterly stupid crap.

The final part of the One More Day fiasco in Amazing Spider-Man (Vol. 2) #545 must be at the top of my personal comics hatelist. Just an utterly terrible conclusion to a terrible storyline that did irreversible damage to a beloved fictional character of mine. The stench of what happened in that issue is still clinging to the Spider-Man comics some 7+ years later.

Not to be all reverse indy snob about this, but bad indepedent comics and bad mainstream comics are really on a whole different level.

I swear to you that the worst comic of all time is not drawn by Mike Mignola.  Or John Romita Jr.  And there's even a lot worse than Liefeld out there.  

And however personally angry you may be that Bendis ruined the Avengers forever  he's at least basically familiar with how writing works, even if some particular stories don't.   And it doesn't have a crudely mimeographed elf trying to have sex with a blob that I think might be a unicorn.  

The worst issue of Avengers from #1-300, hands down.

So does DCs Convergence mini and virtually every 2 issue tie-in count, hard pressed to choose, though the art by classic teams like Tom Grummett (?) (and a few others who don't come immediately to mind) gave some mild redeeming qualities.
Same goes for a lot of the Marvel Secret Wars minis, I guess they have proper artists getting a start on the REAL books. Problem is so many of the stories are plain unreadable (I seem to have a much lower crap tolerance than I used to, I blame youse fullas).

That's absolutely true, but it's the way this was handled that makes it so bad. Why, of all possible solutions (Cosmic Cubes, etc.) would you use Mephisto aka. Marvel's Satan other than to fuel an already controversial issue? I'll never understand the angle that divorcing him would make him too old either, seeing as how they've made no attempt to revert his age. I agree that the marriage was a bad idea from the start. The only way superhero marriage works for me is when both are heroes, such as in the classic case of Reed and Sue in the FF. When a hero is out risking their life saving the planet, and the spouse is complaining about said hero not taking out the trash or changing a diaper, it grates on my nerves. It's often not even satire, but meant as a serious critique. Talk about frivolous and myopic.