We are really sorry that you had a less then pleasant stay.
I will try to answer at least some of your remarks.
First of all, we are renting through AirBnB since about a year ago and never had somebody who left the premises really unhappy. Not all of the guests left comments, but the ones who did only left mostly very positive ones. You can read the reviews and see for yourself.
1. "The home itself is not in great shape". I think you are not right about that. The home itself IS in GOOD shape. I am a physician, I worked in that town and I lived in that house for 10 years. Now I live abroad and the last time I was staying in the house was a little bit more that 2 months before you got there. So I am sure that the house is in good condition.
2. "Unkempt, overgrown lawn ". It surprises us. I don't know what happened. We asked a local kid that we know to do the mowing. We prefered him to a lawn mowing company (even though I pay him more) because this way we would help a 12 year old raised by a single mom without making them feel that they receive some kind of charity. He is a good kid, always did the job but I will contact him and will probably switch to the company because they might be actually more dependable than the kid. So much for trying to help people in need. Having said that, there is a lawnmower in the shed. The kind that has no engine, doesn't pollute at all. You push it and that cuts the grass. If I was there, instead of being unhappy about the lawn I would have used it to do the mowing. It's good cardiac exercise, you live longer and in about 20 minutes the whole work is done (you sait it yourself that the house is small, well the lawn is even smaller compared to the standard american house).
3. Leather chair on front porch dirty, wet, stuffing pouring out of it. I was not there but cannot see why it would be dirty. The cleaning lady cleans literally everything. Wet? Might be. It's on the porch so if there is some rain it might get wet. I cannot see how to avoid that. Now, about the stuffing pouring out of it. That deserves a paranthesis. Basically this planet is home to 2 types of human beings. On one extreme are the ones that do not care at about destroying the planet. After them, the flood ... They never have a thought about how their granddaughters could survive on a planet that they will leave in shambles. All they need is to consume. Their persona is the center of the universe. A guy like that would have bought a new leather chair immediately. Well, that's not me. If you would have paid attention while reading about the house, you would have seen written : "The furniture is pretty minimalist". Minimalism is a way of life (where you try to buy the minimum while trying to satisfy your minimal needs though). Some ways of life are very different compared to yours.
4. "No other usable outdoor furniture". There are enough outdoor chairs to sit 10 people if you look in the basement and the shed. I don't see how you could not find them. We cannot live them out though. It rains a lot in Cortland, and they would get moldy very fast.
5. "In the downstairs bedroom all of the drawers, including those with red stars, were full". In some of the drawers with blue stars there is some stuff that you might need, but I don't see how they could be full.
6. "The queen ‘bed’ is a mattress and box spring on the floor." I really cannot see how that could be a problem and where is the difficulty to get in and out easily (unless somone is obese but in that case what he needs is to lose weight before he starts travelling).
7. "The shower is unpleasant- very short and difficult to navigate". Again, unless someone has class 3 obesity I do not see how the shower would be a problem. I took tens of thousands of showers in that bathroom and never had a problem.
8. "Moldy shower curtains". Sorry about that, they were OK in August when I was there. I'll talk to the cleaning lady. Neverthless if you were so unhappy about that it takes 3 minutes to take your Tahoe to the store where they sell one. Takes another 2 minutes to replace it and it's over. I would have reimbursed the 10 $ but I am sure that being so generous you would have refused.
9. "old, stained, moldy smelling towels".
Old? Well, read again the part about not destroying the planet. We don't throw them away after 1 use.
Stained? I'm surprised, maybe some previous guest stained one, but they were very clean, I can assure you. They might have smelled humid because the cleaning lady put them there a few days before you came. She cleans after each departure so that the house is ready in case someone needs it at a short notice (and the previous guest left a week before you came). In the basement there is a washing and a drying machine in perfect condition. Assuming that all the towels smelled humid (including the backup ones that I hope you found exactly where the house booklet indicates), you go in the basement, wash and dry tem all and in an hour you have 10 towels that cannot smell humid anymore.
Another things surprises me: Why you did not call me. You have a local number that rings directly in France and I could have explained where you find things (assuming that the house booklet is not to be found). Or if you were so unhappy at your arrival, I would have reimbursed you. And you could have stayed in one of the hotels in Cortland. You can have some very good hotels in Cortland for 100-120 $ /night. Or some almost OK ones for 70-100 $ /night. Avoid the ones between 51 and 70. They are mostly where Social Services put the homeless. At my house you have paid about 50 $ per night (plus the cleaning fee, which goes directly to the cleaning lady). Not for 1 room but for 1 house.
Again, I am extremely sorry you didn't call me to complain when you got there. It would have been my pleasure to reimburse you immediately.