So I recently found myself in a peculiar bureaucratic trap. Long stoty short: if a guest leaves a positive text review but rates you 1 (one) star for literaty no reason (i.e. by mistake), the only thing you get from the company is a few condolescences. So if there was no text and low rating, I could challenge this. If it was offensive or contained false information, I could challenge this. But if a guests says something like "very pleasant stay, beautiful house, with a magnificent environment" and gives you the lowest possible rating, the only thing you can do is to write a public responce and go beg the guest to discard the review completely. Because it doesn't violate any Airbnb rules!
A guest can leave you any rating and it won't be reviewed no matter how unfair it is, even if you're a serial superhost with examplary reputation and no negative reviews in all time, even if the review itself totally contradicts the rating. But you surely will receive a politely unnerving email from Airbnb telling you to "focus on delivering the best experience possible for future guests to keep your listing active in search". This is so awesome I actually made my first post on the community about this. Brilliant job, Airbnb team, that's truly an expiring hosting experience (not really).