Anakin didn't know Palpatine was "trying to kill Padme for 10 years". There was never talk about "killing the queen" in TPM aside from something Qui-Gon said, and the assassination attempt was never shown to have been ordered by Palpatine - Nute Gunray made the demand, the Dooku agreed to execute it.
Palpatine obviously knew it was happening, but we're not told at any point that he had already planned at that moment for her and Anakin to fall in love - and that's the real problem. It's not that Sidious is dumb, we just have no idea what he does and wants at any given point - I guess he does some sort of combination of Xanatos/Batman Gambit and Indy Ploy, but we're never told where the one ends and the other begins, and THAT's a sign of piss-poor writing (although it could've been brilliant ambiguity in a different scenario).
At any rate, Anakin doesn't know it at the time. He might've gotten a clue as soon as he's ordered to go kill the Separatist leaders, but again, never brought up anywhere. Is the "Sith lord who manipulates the senate" ever established as the Separatist overlord by the good guys?
He goes over to Palpatine's side as soon as he kills Windu - he probably realizes he's fucked himself over with the Jedi after that and there's no going back, and now he has the chance to save Padme - so he sees no other possibility than to join Palpatine.
Prior to that, there was a short conflict in him when he learned that Palpatine was the evil Sith Lord, between having him arrested, or using him to save Padmé; first he went with the former, then after that silent tower scene, changed his mind.
Make sense. Where the film failed was establishing Anakin's friendship with Palpatine and distrust with the Jedi better, so that when he decided to trust Palpatine on the Jedi's "betrayal", it came off as actually believable, not a completely random ass-pull plot device.
Palpatine only mentioned a LEGEND about some Sith lord who once could save people from death - then when he was getted face-fried, he kinda said "I have the power to save your wife from dying" - could that be construed (by Anakin) as a desperate hyperbole? I dunno. At any rate, when things have calmed down and Anakin knees before him, Palpatine basically tells the same story from before - one has discovered the secret a long time ago, and now they can try and figure it out again.
Whether his face got force-fried, or he let it happen on purpose, is left intentionally unambiguous, so you have no way of saying that "there's no way he could've done it on purpose".
When he got force-pushed by Yoda and showed his pants for a brief moment, I always thought it was supposed to hint at the Emperor's "vulnerability" and the fact that there's still that "man behind the curtain" of his theatralic self-display. No debate, that shot has a huge fat NARM written all over it :D
So yea, you compare the old movies to literary classics with lengthy, complex language, and you don't even understand the prequels enough to criticize these huge clusterfucks. Hey, dude... time to stop arguing for a while, okay? Time to RETIRE! You know... hang up that ooool'... hat...