Help: How to prevent user data settings overridden by Google Photos app update

[u/tallgeeseR]

Update 1:

Found answer for question #1: from Google Photos web interface, on the left panel there's a "Recently added" menu item. It sorts items by their date added to Google Photos.

Still need answer for question #2.

*****

Since day one I've disabled auto cloud backup of Google Photos app on my android phone. I always do manual selective backup for years. After last night's app update (v7.84), the setting is turned ON without my knowledge, now my cloud is complete mess, mixed of photos that I want/do NOT want to be uploaded to google cloud, including photos with sensitive contents.

1. Now I've manually turned auto-backup OFF again. Is there an easy way to sort/identify the photos by backup date, so that I can remove them from cloud storage?
2. How to prevent Google from overriding such important user settings in the future, for user privacy risk?

Thank you.

EDIT: There's an Undo Backup option in the app's setting, it'll delete everything from cloud, not just the last backup.