Appropriately 'Insta-worthy' would have been leaning into the house's heritage and creating a mid-century modern/Scandi home. I suppose there's also still an Insta-movement around grey, crushed velvet and 'Live Laugh Love' but you'd need to style the home to capture that.
But I'm not sure why 'Insta-worthy' was your goal. Profit should have been. The house doesn't have a clear story, or a clear audience - it's a dormer bungalow, I'd have been going for the older market. My folks are in their 70s and looking to move into a bungalow. They're not fans of 'millennial grey' and they're not choosing a home based on how it will look on the 'Gram - when you're doing a reno to make a quick buck, you need to be ruthless about who the market is, and make decisions accordingly. IMO you should have spent more money on the kitchen, less on the bathroom (those tiles are SO subjective!), and just decorated everywhere else. In any colour but fucking grey.
And left the garden well alone. You've just made a massive mess someone else has to fix out back, while making the front look actively unhomely and unkempt.