Thanks @Jo-And-Alistair0
So, from a very quick glance, I can see you are in quite a rural location. It does look like a lovely spot, but have you done any research into visitor numbers in your area? Perhaps in the autumn and winter months it is not uncommon to have only 40% occupancy and you might get more bookings in the summer.
I stayed in an Airbnb in Somerset, close to Wells, which I believe is extremely popular with tourists but, even there, the city was pretty quiet in October. The host seemed to think we would have a very hard time finding pubs or restaurants that would be able to accommodate us for dinner, seeing as we had not booked ahead, but we never once had a problem getting a table!
Also, I see from your reviews so far that your lowest ratings are for location and value. It can be very frustrating when guests mark down on these categories (they are after all aware of both the location and the price when they book), but it might be something to think about, unless it was just the one guest who scored you very low on those and everyone else gave you high scores.
So, yes, you maybe do need to look at similar listings to yours in the area and see what they are charging. Have a look at their calendars and their reviews too to make sure you are comparing your listing to ones that are actually getting bookings.
Having a look at other hosts' calendars is not fool proof as you can't tell whether the listing is booked or the host has blocked the dates for some other reason, but if you look at the reviews too, you can get a sense of roughly how often they are getting booked. If you find that most of the listings in your area have a lot of availability, then you will know it's maybe more of a general problem (perhaps just at this time of year) in your area.
You can't change the location of your listing, obviously, but if guests are marking it down (and also accuracy), is there anything you can think of about the location that you haven't mentioned on the listing that might adversely affect a guest's stay? Even if it's something you have mentioned, guests often do not read the details, so sometimes it's useful to remind them of that particular point/s before they book so that there is no misunderstanding.