I'd look at it in regarda whether or not Google can get your data (or more somply), do you volountarily connect to Google's servers: if not (Piped/VPN) I'd count that as being degoogled. If yes (Invidious etc.) you're still getting the video from Google servers (albeit without ads) but Google still gets their grubby hands on some info about you. By 'volountary' I mean if you block connections to Google with e.g. Noscript and keep google enabled (be it tag manager, gstatic, fonts or user-facing services like Youtube). If you have to enable gstatic or tag manager on a few sites because they're broken, I'd say that's involountary since it's not your reliance on Google showing as much as it's the developers'.
Being 100% disconnected from Google servers is outright impossible these days.