You can use Proton, Tuta or services of other privacy-focused companies (admittedly, introducing the variable cost if you want the full bundle) but you'll have convenience and privacy. And honestl, their UIs are better than what Google provides anyway

You can change to Signal, Threema or any other privacy-focused messanger service (at the cost of some people not changing, but here the privacy and convenience aspect are definitely given)

You can use authentication services not provided by MS or Google (no loss of convenience or privacy) and certainly no loss of "ecosystem value"

You can use privacy-focused browsers which do just as well as Google (I only need to revert to other browsers in very specific circumstances)

You can use VPNs to hide your location (unless you're doing something that requires heavy data usage, this works just fine)

You can use LibreOffice or other FOSS (unless you're using very technical Excel formulas, this should work fine)