Gosh, didn't mean to kick your precious puppy, mate.
Elizabeth is only captured twice, and at specific points in the story. Any other gunfight, she's either cowering or running in gunfire. Either way, enemies charge right past her in a train and gun Booker down instead of capturing her. Doesn't make sense.
And I get the ending, but there are way too many logical loopholes.
It was an alright game, but the narrative fell waaaaay short of what they were originally aiming for, and the combat is just kind of a retread of exactly what they did in Bioshock. I'd give the game a solid B, but it's definitely not the 12 hours of blowjobs that reviewers are making it out to be.