The location option in the android quick menu. I was unaware there was any other way to even turn off the GPS. I assumed it was wifi since it seems to not happen when the wifi is turned off.

It would have at least been corporate speak to have an option called GPS that people assumed was location tracking and was not. Having an option called "Location" that does not stop your phone from tracking your location when turned off has crossed the line into fraudulent behavior for me

Hmm, that seems to completely turn off all location. So I don't know why google would seemingly still know your location.

All they need to do is see what wifi connections I can reach on my phone. In any urban area you can easily reach 50+ wifi connections standing in one spot. If google knows X wifi connection corresponds to Y range of a physical location because of someone else left their location and wifi on, then they can tell that if I can reach 4 or 5 different wifi connections at once then I must be at a certain address.

It's like browser fingerprinting. It doesn't take very many bits of entropy before you are identifiable

Yeah, I know about using wifi for location. But I think turning the android location setting off disables that (in addition to disabling gps and bluetooth location). These pages indicate that:

https://support.google.com/android/answer/3467281

https://support.google.com/android/answer/6179507