Thanks for leaving a review. You are correct. The house is too small for more than 4 adults. It's why we limit the max total to 5 (including kids).
There are instructions for the house in the in-house guest handbook. In the check-in directions we emailed you, there is a paragraph telling you where you can find it, and asking that you take a moment to read it. In there is instructions on how things worked as well as local activities.
The house does have central heat as well as portable heaters that you can move to the bedrooms if you so desire to keep every room toasty. Perhaps, you were unaware there was central heat? This is something we would have been happy to help with had you contacted us.
The checkout/cleaning instructions are fairly standard at a vacation rental. We ask that you take any trash you've created out to the receptacles, clean any dishes you've used, and remove any items or food you've brought with you - standard requirements for most vacation rentals.
In the future, please don't hesitate to message or phone the host if you stay at another Airbnb. We would have been happy to assist you and answer any questions you had!