DuckDuckGo is a good search engine. Their algotithm is most of the time better than google, in my experience.
GMail is ditchable -> ProtonMail
Or you rent your own eMail server, thats what I do.
Facebook -> Mastadon
YouTube -> NewPipe on Android and Invidious everywhere else (you still actually use youtube) or you switch to peer-tube altogether
Google scholar -> not ditchable, it is the best