This made me think how much would I lose if I'll just block all *.google.com domains in the browser? I was using DDG for search and Firefox for browsing for many years without problems, but I also still use Gmail and Google docs (or whatever they are called these days, Google for Work?). Maybe, a blanket ban plus a few exceptions like mail.google.com, docs.google.com, tables.google.com and drive.google.com would not…
There may have been other reasons as well, but I have been strongly inclined to consider this a hostile and even malicious action (organisationally, if not individually) from the start, more than the maps.google.com → www.google.com/maps shift (though I think it’s still at least hostile).
Thus you probably can’t quite block even www.google.com even if you never use any Google services yourself.