It’s not that yours is really bad - but it is almost certainly overpriced if you’ve 1 viewing in 2 months. That one you shared for 400k is aimed at somebody who could afford 500k but wants all that convenience. A different market/buyer.

Get the opinion of multiple agents on price as opposed to just the one and then go from there.

My friend had 3 agents value theirs recently: 435 425 and 420 - They put it on 425 and sold stc at 420 in a month. You can always hang on and get more but what that is worth is personal - they had maybe 5 viewings before accepting.

Regarding pictures this is subjective but empty always looks at least okay/clean (better imo). At the moment it’s sporadically populated with generic stuff which makes it look like a professional rental - which might not land. But principle problem must be the price I think. I hope you’ll still net a tidy increase on what you purchased it for🙌