You can, but the only way to do that is by performing a factory reset. It’s technically the fastest way to delete photos from your iPhone, but it wipes all of your data.
Due to Apple’s design, you can only bulk delete photos from a single location at a time. There are only 3 locations you need to delete your photos from so it’s not too bad:
Library or albums in the Photos app
Recently Deleted album in the Photos app
iCloud (if enabled on your device)