Maybe a bit of a contrary opinion here but I think Google is in the right. You break the terms that you agreed no when creating your account, you loose your account.
I was in a similar situation recently where I lost my adsense account. My appeal got rejected, and once they made the connection to my other adsense account which was run by a business entity, they banned that adsense account as well for violating the terms with creating another adsense account. That it was linked to a YouTube channel that lost monetization and partner status didn't matter. That it was not even breaking the terms as it was owned by a legal entity instead of me as a person didn't matter either. Try to contact a human to get this mistake out of the way? Impossible.
It's important to know how fragile your entire online existence can be. Plan for these kind of things and backup often. Don't trust cloud services and have a emergency strategy ready.
For me, I took control over my domain, moved it to fastmail and would be ready to rewire the mx records to a different server anytime.
My dropbox account is getting auto-pulled to my NAS at home which is powered by a RAID setup, and once a week the files are compressed and stored somewhere else. It's setup in a way that if dropbox deletes a file, the NAS doesn't delete it unless manually given permission to wipe deleted files.
Same goes for Google Music - all files I buy or upload are getting auto-downloaded to the NAS and securely stored.
I have multiple Google accounts for different things: Music, YouTube, Analytics and all services that allow it have multiple account managers setup, just in case a account is getting terminated and login is no longer possible.
Then I still have 1 google account that I am using as login email for very important things, just because it's the least likely to get compromised.
After signing up somewhere with OAuth, I also immediately go into the settings and give myself a password and valid email to not rely on the OAuth provider.
Paranoid? Don't think so. Since knowing that my data is waiting at home for me and can't just disappear, I am sleeping a lot better. It was a bit annoying to go from the convenient "my google account is my life" to this solution, but the ease of mind is so worth it.