Agreed. You can currently do two-step process to get to the old useful search by clicking "Find image source" in the side-bar Lens results, but it's inconvenient enough that I barely use it any more.

In some browsers/profiles I use a "Search by Image" extension that still works properly.

When Chrome first made Lens the built-in image search, there was a way to turn it off. Does anyone know if that's still possible by some more-hidden method?