Not that bad, but that’s the general idea – it’s different from hostel to hostel – Ambleside is pretty nice, with 3/4 bunks per room, a little space, a nice bar and restaurant downstairs etc. The showers are down the corridor and it’s generally very comfortable, the staff are nice and there is a shed for bikes. The kitchen is clean and large.
I’ve not used esthwiate, but it could be slightly different – bigger rooms, not as recently refurbished etc. but none of the YHA premises are horrible. Pen Y pass in Wales has some pretty big rooms, and I’ve stayed in a large shared one in there before – someone was snoring, but that’s life.
I’ve stayed in a few on my own and never had any problems with them really – nicer than camping, cheaper than a hotel/B&B.