My main gripe with Google Lens is that it replaced Google Image Search on their browser. Used to be able to drag/drop an image into Google and it’d do an instant search for all similar/identical images. Now it opens Google Lens and it just gives me a bunch of “related links” instead of a proper image search.
To get the old functionality back, I need to use a “Google image search” add-on in my Firefox browser. It opens the old Google image search page.
I mostly use it to find higher resolution versions of old, grainy images, but Google Lens took that functionality away from me.