I've recently deleted my Google Photos as well and found the interface extremely unintuitive. Turns out you can multi-select with Shift, though there are no UX

I've recently deleted my Google Photos as well and found the interface extremely unintuitive. Turns out you can multi-select with Shift, though there are no UX affordances for that. FWIW, I've never had an Android phone but apparently long ago (9+ years) I've had some photos up on a product called Picasa. When the product died, I just assumed the photos will be deleted but instead they got transferred into this Google Photos thing. Only found out when I did a "request my data" for my gmail and got back like 40Gbs of archives.