I know you said you weren't coming back @Onwayto50 but I know you will be reading. I'm so sorry that you have been upset about peoples comments - tiz AIBU and people are harsh! 😬May have been better posting it on the Property board. (I don't think I was rude, if I was I apologise.)
But anyway, try not to take the comments to heart, people have different views and opinions, and frankly, I think your house looks BETTER than when someone listed it in 2018. I think it's lovely inside. It looked bland and dull before. Some other posters have said it's nice too.
All I would suggest is maybe re-taking some of the photos because some of them do make the rooms look long and narrow, and I can see from the room measurements that they're not. The photos also make the rooms look smaller than they are. They don't look as big on the photos as the actual measurements IYSWIM.
And yes it can be classed as a 4 bed, even 4/5, because of the extra room in the basement, (and regarding the smallest bedroom, just because a bedroom is small that doesn't mean it's not a bedroom - as several posters have said! )🙄My younger DC had a bedroom around that size til they we moved to a bigger 4 bed home, (when they were 11,) and they managed perfectly well in it for 11 years. Your smallest bedroom is 10 ft 3 X 6 ft 3, our smallest bedroom was 10ft X 7t!
And yes, other houses around you don't have as much room as you (because of said extenstion.) Ignore people saying you have no right to bump up the price, because ALL houses have gone up loads since then. You have every right to ask whatever you want. Of course, if it's not selling, you may need to drop it. It could be a bit overpriced now (sorry!) You may need to drop it 5 or 10 thousand. though, as I think £395K is a bit overpriced for it (sorry.) Even with the extension and the fact it is nice, I think it's too much for a terraced house. (That maybe has no parking, I can't see any on the listing...) I suspect you may need to drop it to around £360K to even have someone look at it.
Hopefully someone has seen your house on here and fancies buying it! (Or you do pick up some tips from some of the posts here) Even the harsher ones!
Good luck. Happy moving. 
p.s, You could report your thread to Mumsnet and ask them to delete it if it's upsetting you.