Personally I haven’t had much success at all submitting feedback. I guess that it is hard when you have so much traffic, but whatever they are doing really doesn’t seem to be working right now.
`!fedex` has been broken for months because FedEx changed their tracking URL. I submitted feedback using the specific form they created for situations like this, and it is still broken.
When you get bad results and know which result should’ve been at the top, there is no way to say what page you expected to see but didn’t, unless you choose “Other” and write it in the box, but I suspect that all goes into a black hole too. Not quite sure what the solution is here since obviously they want their results to not be bad but it’s not so simple as hand-tweaking one query until it’s better.
On Firefox on desktop I see the "feedback" menu in the lower right corner.