It's always the price, someone will compromise/fix the things they don't like if the price is right.
You can dress it much better, the outside looks awful, the weeds, black front, it just isn't very appealing, you could tidy up, get some nice pots with flowers (closer to spring obviously, and you can take them with you), paint over the black it's awful.
Inside it just isn't staged as a home downstairs, it's hard to imagine living there. Also the kitchen is just such a let down, given it is the most expensive room to do I'd look at that and think well that's 20k+ before we've started. I'd buy some new cupboard fronts online to try to dress it up, that mint green is awful.
I think the main thing that will put people off though is marketing it as a 4 bed house. We are going to be moving to a 4/5 bed house soon, we won't be going to view any houses where the bedrooms at least 2 bathrooms aren't on the same floor, if you are counting random rooms around the house they aren't bedrooms, they are reception rooms. This is a 2 bed bungalow with storage/a guest room upstairs (my husband's gran's house was like this 2 bedrooms and a tiny bathroom upstairs, she never ventured upstairs, her family slept up there when they stayed). Or it's a 2 bed house with a dining room and office downstairs, and less than ideal having the proper bathroom downstairs. A family looking for a 4 bed home won't want their children dotted allover the show like this, there isn't enough reception rooms for it to be a 4 bed besides.
Tidy it up, relist with the correct number of bedrooms and drop the price. I'm sure it'd sell to someone needing a bungalow or a couple without children.