Now you're just stating incorrect truths.
1.)Hidan is unable to die, he was outsmarted by Shikamaru a ninja with a genius level IQ, whether or not he was a kid doesn't matter.
2.) Diedara, the weakest of the Akatsuki was pushed into a corner yes, but still was outsmarted he didn't anticipate that Sasuke would've have thought to do that.
3.)Kisame took Guy's strongest attack and still survived, also battling A and B at the same time.
4.)Itachi planned everything from the beginning, toppled with the fact that he was sick. And you also just disproved your point, the fact is he "LET" Sasuke beat in order to empower him and change his path of vengeance.
5.)Zetsu isn't just a puppet for Obito, he has his own mind and can act on his own accord.
6.) Orochimaru was in a heavily weakened , if you knew anything about the Living Corpse Reincarnation justsu you would know that when Orochimaru uses it, he is at the end of his current bodies cooperation span and is left in an extremely vulnerable state. Even with that being said, Sasuke didn't kill Orochimaru, he absorbed him. And the fact that he is alive shows he isn't dead.
None of them were at full power at the time of their defeat. I'm surprised that you brought up Itachi, knowing that he purposely allowed himself to be defeated.