Sadly the whole point of them is maximum tracking, so they’re installed on key points of the roads. Mapping a route avoiding these is a fool’s errand.

Doing all that will reduce/eliminate some data points, but not nearly all.

https://coveryourtracks.eff.org/

After running through the test here you can see the various factors that can be used to fingerprint you.

Your language, timezone, screen specs, gpu, audio etc will not change with your browser.

Except this ‘signing’ is more of a control feature than a security feature. Just because Google markets it as a security feature doesn’t mean it is.