You can delete the posts using the little dustbin icon at the bottom right of the post (they’re greyed out until you hover on them) but I’m not sure how you delete a thread.
Edited - Well, I’ve had a look at one of my old threads, and still can’t see a way to delete the opening post on it, so maybe you have to request it.
I wouldn’t worry Susan, nobody who knows you on here (or on British Crafters) will think you’re being negative, but it does seem a low number of views for such an established shop. I suppose it just proves how important promotion is on here, as there isn’t very much passing trade. It’s a quiet time of year though, sunny days are always quiet on here, I find, and Etsy gets global views, so tends to be busier at all times. As long as you’re selling somewhere…and it will pick up on here after the summer, I’m sure. Nil desperandum, as my mum always used to say