Estate agents can get it wrong, especially if there is little local activity and the house is misplaced for the area (it is).
The area is wrong for a house of that type. Maybe they bought cheap in 2018 hoping to do up and sell for more, but its completely the wrong thing to do with a house of that type in that area, a savvy developer would have turned it into flats or maybe rented it out as a HMO.
Adding into it the poor energy rating - most people are now wise to the fact that these older houses cost a fortune to heat - and you are looking at something which in my opinion is going to be hard to shift.
I would drop the price considerably, probably by 100k and go for offers over to see what the local market is willing to deliver.