Sheets and productivity tools > libre office or Apache open office
YouTube -> Invidious or even better, odysse
Google search -> duck duck go, SearXNG, StartPage, etc
Gmail -> not a ton of great options. I’d probably recommend proton mail but the FOSS email world is definitely lacking, or gets blocked or goes down, harder to self host etc.
And I agree for sure. In order I use firefox (and brave sometimes), Proton Drive, Apple Productivity suite (pages, numbers etc), and either startpage or qwant, and proton mail. I do still use use YouTube Premium, but the point is Google doesn't need to have its fingers in every aspect of my digital life.