Your EA sounds dreadful. I'd change ASAP!
My thought on looking at the pictures (before reading the thread) was that it was the (empty) house of an old person who had recently died. The photo with all the open windows and doors suggests to me that the house has some awful smell that the vendor was desperately trying to hide!
Kitchen is dated (not a problem in itself) but I would assume that the bathroom was much worse and too awful to show.
Yellow wall and the huge tv make that room very unappealing.
Lack of upstairs pictures also puts me off.
Garden needs weeding and a bit of 'wow' factor.
Sorry to be brutally honest. Sounds like this thread has given you lots of good ideas for moving forwards.