Can you turn the sofa round so there's more of a snug living space feel? With the sofa facing the patio doors rather than the dining kitchen area?
And agree with the blue boxes. They're overwhelming and scream lack of storage. Even remove a few of them so they're not a solid line.
Can you take a garden photo at any time of the day with the patio area in sunshine?
Otherwise it's the market. And there's not much you can do about that right now. It's so depressing.
Reduce your price if you need to sell fast, hold on if you don't.