Ironically she's probably pissed off Hannah hasn't shown the remotest interest in Shitlid - it would've made her feel like she'd bagged someone other girls wanted (she hasn't!)
There may be some selective editing going on but from what we've seen Polly is horrific. Literally spoiling for a fight.
Luke looked pissed off not everyone said Amy when the boys were asked who was the sexiest. He def sees her as a trophy. Im surprised several said Shannon - I'm sure she's naturally pretty but her face looks so plastic it's basically expressionless