Amy has had it in for Lucie from the very first night (when Anton, who was coupled with Amy, told Lucie he fancied her)...Amy is so insecure and jealous that there was no coming back from that. Lucie was faultless but disliked regardless, it won't be the first time a girl like Amy has turned on her...it surprises me that Lucie seems so confused by it and doesn't recognise it for the jealousy it is. Also surprised she didn't see Joe's behaviour as controlling, but meekly allowed him to control her.
I think girls who are raised with weak female role models turn out like this. She should have bucketloads of confidence but she really doesn't.
I'd love to see her stay in, find love and win. But sadly life doesn't really work out like that.
On the up side I'm watching with my teenage DD and there are some excellent life lessons to be learned (and many deep chats to be had) about mean girls, jealousy, insecurities etc.