I think Nagato was the only one who got trolled. Naturally, I would've preferred that Sasori didn't choose to die, that was just lame, but I didn't consider it trolling. Kakuzu's death didn't bother me that much, he was just fooled. Besides, his jutsu were too darn powerful in my opinion.
On to Nagato: This is the guy who is hyped up as the Akatsuki leader, the only one with the Rinnegan and then destroys an entire village by himself without getting a scratch. Then, this cold-blooded killer is swayed by a little talk...So much for him. And then, with the Edo Tensei, he gets sealed up after what, just a few chapters? Sure, he showed that he was a beast, but I can't help but feel he got taken down too easily and too quickly.