It takes one hour and eighteen minutes before Beca shows any reaction to Jesse that isn't incredulity/horror. And then he's an utter douchenozzle to her.
What makes the first hour and 18 minutes even more horrifying is its plausibility. It brings me back to one summer, working in a library, where the guy shelving books downstairs kept talking to me. And he wasn't awful, or anything, so I gave him my phone number, only realizing TOO LATE that his asking for my phone number meant he might want to ask me out. And this was a HELL NO. But he was nice. And he wanted to be a librarian because he enjoyed shelving books. (OMG). So I didn't want to blast him out. (Then there were the hilarious two 'dates.' One which I dragged my cousin on as chaperone, and the second which ended with me rhapsodizing about Emma Frost, because he wasn't getting the hint. I think Emma Frost managed to give him the hint. Not into dudes. OK?)
And this was EXACTLY what Jesse was doing - not taking a hint. But Jesse was even worse! He was pushy and clearly assumed that because he wants her so bad, he deserves her. (hello, rape whistle.) And the worst bast was her falling for his bullshit. "I care about you." She didn't want him to care about her. She put up with it. What she wanted was the Bellas back. And she got it. And then she was proven right about movie endings. They really are predictable. :)
So, I really kind of enjoyed that movie. :D