@Lorena551
my recent guests also didn't read, were unhappy, I refunded them in full for remained nights and they left. You would think they would be grateful for that, right? Wrong. They shifted the blame to me and I got 4* overall, accuracy and communication, and in explaining why she gave 4* she admits she didn't read.
So, the point is, with bad guests you always lose, you just can't win.
Guests were superficial in the past as well but lately, this phenomenon increased drastically since Airbnb decided to hide the listing's description, house rules, and other important information behind the "Read more" link.
As @Colleen253 said, keep your conversation on the ABB messages system and use her threat as a reason to remove her bad review if she leaves one