Do you know what de-anonymization online can do?

Exactly, de-anonymize you, based on your behaviour patterns collected over years and decades and any data they can lay their hands on. It doesn't matter if you switch accounts or phones or both every week or even type of device.

If every one of your new accounts/devices is at the same place, is awake at the same time, uses the same apps, has the same typing rhythm, browses the same websites at the same time of day and logs in with the same accounts and sings the pokemon theme song in the shower every morning and walks in the park twice a day with dog barking and "good boi" sounds happening in closest proximity to the tracking device you carry in your pocket - they'll be pretty sure it's the same person.

Wasn't there a scandal just last week about Samsung smart tv's recoding audio nonstop and sending it to their servers, even when they are "turned off"?

And even if you are a hermit that cut off all their devices and access to the internet altogether, other peoples devices will collect data about you, enumerate you as a seperate entity from the device holder and keep collecting and patternmatching.

You make it sound like google did this specific thing on accident.