Paint the main room a different colour to the kitchen units. Lampshades on all bulbs. Plants. Dress the windows.
Take the TV out of the bedroom. It looks small in there, not sure if you can fix that, but the camera angles could help.
Clean the mouldy sealant in the shower.
Looks like a man cave it the moment.
Got to Exeter Ikea and get some plants and blinds, soften it.
Move the sofa to the window wall and get rid of the runner.
It’s not a bad flat at all, but presented differently it will sell.