Delete photos from iCloud Photo Library faster
Login in iCloud.com (from a computer) with your Apple ID.
Click on Photos, then click on Albums at the top.
I'm not sure if disabling iCloud Photo Library on all devices causes your photos to be moved to Recently Deleted automatically or not, so if there are still items showing in All Photos, click on that. If not, skip to step 9.
Scroll to the top of the grid of photos.
Click Select Photos at the top toward the right side.
Click the first photo. Scroll to the bottom of the grid of photos. Press and hold the Shift key, and click the last photo.
Click the Delete button in the middle of the blue bar at the top.
Click "&lt; Albums" at the top left.
Click on the Recently Deleted album.
Click Delete All at the top toward the right.