I posted on the other thread too before it was deleted.
You are either going to have to spend some money to sell or drop your price and sell as a doer upper as Shifty has said.
Seven bedrooms is a lot. Change one to a bathroom at a minimum. Depending on size you could divide one into a bathroom and also En suite for another room.
Get the gym equipment into a room that you can label a gym. At the very least get it out of the room it’s in.
Get rid of all the leather sofas etc in bedrooms and dress the bedroom as actual bedrooms rather than studio flats/bedsits which is what they currently look like.
Dress the beds. Valances to hide the divans.
Lose the table cloths on your dining tables. Try to get a bigger dining table for your dining room. Looks like the one in there only seats 6? As I said lose the table cloths and put either a vase of flowers or a candelabra.
Would agree about the red/green room. Won’t appeal to many. Sorry!
Sort out your books. Far too many in that room. You could put some on small book shelves in bedrooms or just box some up and store them.
Fix the rugs in the hall. Why is one hooked over the radiator? Centre the red one on the door.
Not sure about the kitchen. I think most people would want a new kitchen but that breakfast bar arrangement looks really odd. I would be factoring in the cost of a new kitchen if I was viewing.
It’s hard when you have lived in a house for so long. You stop seeing things I think. We are doing a few bits to our house and it’s making me see other things with new eyes. Just general clutter. Things we have done for ease or because it suits us but doesn’t really work for anyone else.