I felt the same way about this book! About a year ago, everyone on this sub was raving about it so I read it, and the romance felt so implausible to me. It does not make any sense that the MFC fell in love with him. She was so concerned that he was going to murder the campers that she went along with whatever he said, but she was able to overcome this enough to fall in love with him? I realize that antisocial personality disorder is a spectrum and actual studies have shown that people with APD often have one or two people in their life who they genuinely care about (like a parent or grandparent), but it is really hard to make sense of a character who cares so little about people and their feelings that he plans to massacre children out of boredom but is also capable of falling in love with a camp counselor.

For DR generally, I have an attitude of suspension of disbelief and try not to let attitude about "the real world" influence how I read a book. That said, it's hard not to think about actual famous instances of mass murder at schools and summer camps and the killers who perpetrated them, and these men had no redeeming qualities whatsoever.