John Crichton said:
Neither man was a genius and both were fatally flawed. People do rash things and Angier had already proven that he was a bit of a hothead.
Okay, I'll give you this. But...
And would you keep an exact duplicate of yourself around if you were a self-centered, obsessed, overly secretive, rich, manipulative murderer?
Maybe, maybe not, but that's not how it was presented in the movie. Angier said (during his dying confession / flashback) that he went into the machine with a gun handy because, "I wouldn't want to live like that" -- i.e. with a duplicate. He said it as though his delicate philosophical sensibilities would be offended by a double existing -- not as though he were an egomaniacal villain who would murder his own mother to get his way.
But even if I concede both your points, the movie's final act still depends upon stupidity -- if not from Angier, then from other characters.
(1) Borden's wife. There is no possible way that she could fail to realize that sometimes "her" Borden was really the twin. Yet the movie presented things such that she didn't know or realize this. Stupid.
(2) Borden. He essentially sells his daughter to some random nobleman he's never met? While he has a convenient twin on the outside who could check up on the nobleman? Yeah, right. Stupid.
(Of course, what's even more stupid is that movie undercuts itself by killing off Angier, rendering the daughter's situation irrelevant. It would have been far more dramatic if Bordern "won", but had to leave his daughter permanently in Angiers' estate.)
(3) Cutter. He remarks, "Blind stage hands. I approve." What he doesn't say, but definitely should have, is, "Blind stage hands. Three or four of them. Who all look identical. Er... what the [bleep] is going on here?!" Stupid.
(4) Angier. So let me get this straight: his means for keeping his awful secret a secret is to tell Cutter not to go backstage, and then employ a bunch of blind watchmen? You
have to be kidding me.
First, Cutter is the guy who was coming up with all the magic tricks throughout the movie. Do you think that maybe, just possibly, he might be curious about how Angier does his transported man trick, and might, just might, want a peek backstage?
Second, what kind of mental defective uses a blind guy to guard the watery tank in which he is murdering himself/a copy
every night for 100 days?
I'm sorry, but I still say the movie insulted my intelligence. I'm willing to suspend my disbelief -- I have no problem with the Tesla machine -- but I'm not willing to suspend my stupidity filter.