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

The website is a manual of how to keep safe online and it has been created by six professional hackers and it's called: https://watchyourhack.com/. Source: over 1 year ago

Https://watchyourhack.com/ Watch Your Hack explains how to protect yourself from hackers, in laymans terms. Six professional hackers helped create this manual. Source: almost 2 years ago