Hi @Juliette64 , you got some great advice and pointers here from various hosts, specifically about your pictures, and the sad fact that guests are just not reading the detailed explanation a host provides. I would work on the pictures asap, at least make the ones that are tilted upright, that would just take 20 minutes or so: some people might take it as an indication of how you are taking care of your listing ( and hosting?), and you would want to come across as a professional.
The good news is that you got plenty of requests and bookings, wonderful!
The not so good news is that your overall rating shows 4 stars: the bottom line is that to remain a successful host you simply need better ratings, or Airbnb will be on your back before you know it. It's great how pro-active you are in immediately addressing specific complaints from guests, such as mattresses on the floor, (when actually you have low platform beds), no TV, etc.., by making it more specific in your listing. But then it comes around again to guests not reading it!
Here are two ideas that have not been addressed yet by other answers you got:
1.) perhaps give up on IB for a while - that would give you more opportunity to screen your guests and to possibly decline the ones you know will not be a good fit for you = better selection of your guests would help augment your ratings.
2.) dealing with the expectations you cannot meet, here is a "far out" suggestion to meet them: how about you limit your max. people count to 4 - and you convert one of the guest rooms into a sort of living room, with a couch and a TV? Can all be done without spending too much money, just as the curtains wouldn't be too costly. Unless you are against that idea on principle, it sure would solve a lot of those issues guests bring up repeatedly. Or, as someone suggested, you need to focus more in detail on who your niche market guest is and only accept that kind of guest, but again, being on IB will not accomplish that goal.
So, I advise to make some changes: either accommodating more main stream people and their typical needs by adding TV, wifi, a couch, curtains, etc., , or only accepting your niche market people by selecting them very carefully.
Good luck and happy hosting to you!