A few thoughts without repeating insightful comments of others (which I probably wouldn’t have come up with!)
You have a beautiful place!
You can track your views from last year on Airbnb Airbnb Number of Views: Changed Dramatically from Last Year?
My views have dropped dramatically too
You can organize your pictures better, by room: in 'Rooms and Spaces"
Aside: You say some place don’t have rails from heights. Is this by the outside deck? If you’re not in compliance with the building code on a safety feature, disclosure will not protect you. So IF that’s the situation I strongly advise you to fix that, though I don’t think that is discouraging any reservations. With that kind of disclosure I assume you have no commercial insurance, which most would recommend getting.
I wondered if it got uncomfortably hot in summer but no one mentioned that.
How’s the Wifi? Did you get Xfinity’s fast service? You can verify its speed and it will be posted. With review about cell service, Wifi calling might be very important. Wifi is concerning.
Consider creating an Airbnb online guidebook for your area, though I don’t know its marketing effectiveness . It sounds like you have this information, just not in guidebook format that prospective guests could see before booking.
You might be contending with bigger trends, as mentioned by others.
It seems to me that you can focus on best communicating what you offer (which is WONDERFUL!), offering great hospitality and generating enthusiastic and specific reviews (both for getting new guests and repeats), considering additional platforms like VRBO, keep researching what others are doing.
Good luck! Our views are down but I sense we’ll have a good summer anyway, and I bet you will, too, plus you really offer a lot for EACH SEASON (your pictures and guidebook should tell THAT story)