I don't remember Barbara being this annoying
Seriously, she spends the first 30 minutes of the film pissing and moaning that Batman won't let her put herself in dangerous situations, when she proves time and again that she's not ready for them. She was like Anakin Skywalker whining that Obi Wan Kenobi wouldn't let him do stuff.
I appreciate the attempt at making her a more pivotal character prior to her getting shot, but the attempt failed. When she was yelling at Batman just before the sex scene, I said out loud, "Jesus, just push her off the building!"