My worst Airbnb stay in my 10 years of using Airbnb. Bug-infested, urine smells, rotten food in drawers, onion peels laying around, trash on the front lawn, and more.
After asking for a partial or a full refund from the host, she declined and told me different information than she told Airbnb support staff. It was a timely situation to resolve, but fortunately, I had photos of everything so I got a full refund but only after filing a case through Airbnb.