Oh dear.
I've done a couple of flippers and always had a good result but I've looked at the area, the potential sale price and what would attract the potential buyer - not what someone thinks is 'Insta worthy'.
What made you think that was 'insta - worthy' OP? There must be some reasoning behind that.
The before would have had much more appeal because with the garden alone, you gave people something to work with. Most people don't actually want a blank canvas from the off. They want something that looks nice whilst they decide how to put their own stamp on it.
The black is not a selling point. The wood work isn't in good enough nick for that. It looks like you have tried to cover something up.
The interior is not welcoming at all. Either stage it to look like a lived in house or clear it out completely.
You need some colour inside and outside.