Another reason I don't like Sian

When the girls have to choose one out of three, someone like Sian should have stepped back, especially since she already has three guys interested in her. She chose another guy who could have pursued her like the others. Couldn't she have given Minseol or another woman a chance to bring in the first guy on the island? It feels like everyone, including her, has forgotten about him, and now he’s just the fourth guy.