You can make just about any fight last 20+ hours in FF11, especially when doing it wrong. Pandemonium Warden's forms seemingly shift forever, and often differ for different people attempting it. The forms aren't always the same. Maybe you should base your info on more than a Yahoo article and one LS' attempt at a new boss.

Fights in offline FFs where your hand is being held? In FF7, there's a boss where you're told not to attack while it's tail is twitching or something. In FF4/6 you're told not to attack certain bosses at certain times because they'll counterattack. You're flat out told how the bosses work.

The Mt Ordeals fight is pretty obvious, and if you can't figure out you're not supposed to attack him from the message, then yeah, you're dumb. All those battles are dumbed down with the game telling you how those bosses work, so even the dumbest of people (well, maybe not the ones who couldn't figure out Ordeals) could figure it out.

SE's only adjusted AV when people have used exploits, which would lead to effects like AV not being able to attack or use abilities. Glitches and oversights.

The battles aren't meant to last 24 hours. They will though, if you keep doing it wrong, much like the Cecil fight, except SE didn't "auto-win if you're stupid enough to keep doing it wrong for an hour" like in the Cecil fight, or drop "DO THIS, DUMMY!" overly obvious hints throughout the battle.

FF11 is vastly more complex and difficult than FF4 though, and your posts show you've no actual experience in FF11 endgame, and likely none in the game at all.

AV and PW are optional bosses, meant to be challenging, and not a battle where SE holds your hand. The fact so many people can't figure out the Cecil fight, probably not even the damn Mist Dragon fight, even with hints, is testament to why people haven't figured out how to beat AV/PW, especially since no hints are given and FFXI has so many variables.

You say the bosses shouldn't count, but have no credible reason why.