@Abi010
We also have never received a truly scathing review, although we have had guests who would have done so if we had confronted them with their violations of house rules, leaving the place in a mess, or minor damages.
What we've found is that unsavoury guests know very well that they've broken rules or left the place in a bad condition or caused minor damage, but if they are sent off with a smile and a thank you, they think they've "gotten away with it" and tend to write flowery reviews to ensure they don't get clobbered in a review or damage claim (although that's quite naïve since the review system is blind).
So, when we have guests who openly violate house rules and/or leave a horrible mess or minor damage, we send them off with a smile and a thank you. but then wait until the last minutes of the review time to post a truthful, concise review without any sense of personal attack. Just the facts: Bad guest.
Filing a claim with Airbnb before the review period has expired is a guaranteed way to ensure a scathing review complete with fabicated atrocities you committed against the guest, which are nearly impossible to have removed. They may even request a full refund for those imaginary atrocities.
So, just smile and wave them off. And keep Airbnb out of it.
And although you suffer major cleanup and/or minor repairs, you won't likely receive a scathing, damaging review nor suffer the wrath of having to fight Airbnb over a refund demand for fabricated horrors you imaginarily committed against the guest.
The guest, on the other hand, will have to to close their Airbnb account and open a new one to eliminate the bad review.
All things considered, this is about the best you can expect.