I couldn't agree with this more. Extremely frustrating.
I did find this support info which may help (though it's definitely not substitute for having user ability to manage by any means), but hope it helps! According to this support info, images DO finally get deleted in time (between 8-38 days) apparently, but in an urgent situation you an send an email for SS for assistance in getting them deleted sooner: https://support.squarespace.com/hc/en-us/articles/205812748-Image-and-file-URLs-in-Squarespace
However, Squarespace, PLEASE give the ability to manage this on the user end.
Hey! I'm working on a site and I played around the options (newest version of Squarespace) a lot. This uploaded the "dummy-images" on the site every time and now when browsing uploaded images it is hard to find the relevant pics. How do I manage the images uploaded to the site? I'd really like to remove all of the unused images.
Screenshot from the media browser below.
