@Willow8This is what I would do, and looking at it from only your point of view.
1. Leave them a standard review on the 14th day, at the 'very last hour'.
2. Leave them a 'short & sweet' one: 'Guests came and spend 5 days' and (perhaps give one example of what disaster they were). No drama novel. Of course - Thumbs down. Airbnb is known to remove negative reviews by hosts if they get too 'heavy' against a combatic guest.
3. When their review goes up publicly (14th day), your response to THAT one is the most important one, because that is the one your future potential guests will be seeing. If you like, bring what they say here, and we be happy to help.
Remember - a negative review, even by a lunatic, it is an opportunity to sell yourself, your place and look good. 😉