Yes, you are right, google maps is way better than Marble. I just mentioned it because many people don't know at all that there are alternatives. It depends on what you are looking for, but the satellite view of gnome maps is almost on par with google maps, and way better than marble (for whatever reason). Sadly, none of the alternatives has something like street-view. Funnily, for navigation only, I prefer open street map to google. (There is also an pretty good app called OSMAnd, it is even possible to download maps & wikipedia entries for offline use.) Here maps is an alternative as well (belongs to Nokia and different car manufacturers, so at least not google).
Sadly, the "profile changer" thing is almost impossible, for various reasons. You already mentioned language, display & window resolution, but there are many more things that can be used for tracking. You can only try to make it more difficult for them. Good start are the "uBlock Origin" and "uMatrix" Add ons, even though it takes some time to configure that stuff to make it work with every site (Instead of uMatrix, if you prefer less handwork, "Decentraleyes" does a pretty decent job as well). Bonus, you are practically ad free, mostly script free (especially all the facebook, twitter... buttons can be blocked, referer gets hidden etc.), and it can save you a ton of (mobile) data volume. For twitter & youtube I use the add on "Invidition" - works very well for twitter, for invidious it's so so. Alternative would be youtube via one of the many stand-alone programs, I like FreeTube. As long as you don't log in, it makes you anonymous (via invidious) and ad free.
What I did not try yet, is the browser "Brave". That is a chromium browser with many built in anti tracking things. I was told it even has Tor built in for the "private window" thing. Wanted to give it a try for ages, always forgot.