There was mold in the living room and bathroom, and a terrible smell due to it.
The kitchen had a giant hole in the ceiling.
Every dish in the house was dirty and the cleanliness of the towels was... questionable at best.
There was a leak in the neighbours house and they came to ask for help, because according to them they'd reached out to the host multiple times but had received no response.
The host sent a noisy plumber to the house in the middle of the day without any warning, which was terrible considering I was working from home. When the host did reach out an hour after the plumber had arrived and I pointed out the fact that he shouldn't just send people to the house without warning the guests his only answer was "I knew he was coming".
The house is very central and check-in was easy. Wifi is good.