Last year you posted this:
Once your string of all five star reviews is broken, it’s broken. I’d advise relaxing about it. Yes, it’s annoying but it’s part of the business. As @jacquo has posted, even prize winning books with rave reviews get one star reviews on Amazon from people who are illiterate or jealous or whatever. To have almost 400 reviews at over 4.9 is great.
One thing I might suggest is to raise your prices. I know it’s winter there and the pandemic is surging but under $100 USD a night for an entire house is ridiculously cheap. Maybe raise your base price and reduce your per person price so you don’t have to argue with people about it.