You'll get a private update soon <3 I'm just here to give my two cents on your suggestion as a programmer.

It seems like your issue was caused by an error made several years ago, and it shouldn't happen to anyone anymore nowadays, since the wishlist code has been revised and improved. We do apologize for that mistake and again you'll see an update from us on fixing that for you soon.

On the suggestion itself: since it's not an error people can change anymore, and since having a "delete all" button can be dangerous, we won't be implementing it.

However, I wanted to propose a compromise, after reading what people have said here.

Currently, if you delete a wishlist category, it just shoves all the items into your Unsorted category.

How about I add an option, like a checkbox or something, to delete all the items from your wishlist when you delete the category, instead of just putting them into unsorted? Would this be something people would like?