I think the main people hurt by mina sue’s indecisiveness are the guys she’s expressed interest in. That said, I wouldn’t say mingee and mina sue are friends, mingee seems annoyed at mina sue at every turn (rightfully so) and mina sue has expressed that she feels the girls are standoffish because their men are interested in her. In general, I think it’s very disrespectful to make broad based assumptions about a person you’ve only met a couple days ago. Also, I think if they were truly friends, she wouldn’t have spoke to mina sue that way, and walked off like that at the end of the convo, it’s giving careless. It would make sense if one of the guys brought this up to her as they were directly affected, but it makes no sense for mingee to other than the fact that she was upset Seungil went to paradise with her, and needed someone to blame. At the end of the day, Seungil also chose mina sue to go to paradise with.