Replace file storage with a hard disk you control.
Replace chrome with chromium (or, better, firefox).
Replace android with an android fork that uses f-droid instead of the Play store.
And you're done, no more Google usage.
I currently use my Google account only for signing in to YouTube, so that it keeps track of my subscriptions and let me write comments. I use Firefox's "multi-account containers" so that only the "YouTube" container knows my Google account. Google Analytics for non-YouTube sites doesn't get to trivially associate me with my Google account, because I look at all other sites in different containers.
If someone created an alternative YouTube interface that allowed you to keep track of subscriptions without telling Google who you are, I'd probably use that rather than logging in to YouTube. Bonus points if it also gives you a disposable Google account with which to write comments.