You have options. If you have a password manager, try searching for every account associated with your Google account, and change the email on file for that account to something more private like Tutanota/Skiff. Or go here to see what accounts you have and how to delete them. Source: 12 months ago

For deleting accounts there is https://www.deseat.me/ but seems to be down at moment. Also https://www.accountkiller.com/en/ and https://backgroundchecks.org/justdeleteme/ I'm not sure if any of them do GDPR, not sure if they scan GMail. Source: about 1 year ago

Https://backgroundchecks.org/justdeleteme/ hasn't updated in nearly five years: https://justdeleteme.xyz/ is the new website that is still being maintained today. Source: about 1 year ago

And here you can narrow down your accounts so you can delete them https://backgroundchecks.org/justdeleteme/. Source: about 1 year ago

Start by deleting all your old and unused accounts. Make sure no one can find all those embarrassing teenage photos. A helpful resource for this is (Just Delete Me) which is a directory of direct links to delete your account from web services. Source: over 1 year ago

You should definitely check for "Do not sell my personal information" notices (and whether or not you have disabled them) as well as sites like https://haveibeensold.app/, https://haveibeenpwned.com/, and https://breachdirectory.org/. Aside from that, you should try using a VPN and firefox w/ duckduckgo for a few weeks consistently. After that, simply getting your home IP changed by your ISP should stop all... Source: over 2 years ago