You don’t have to sue them. Suing a multinational company will bankrupt you. Let the data protection authority handle this.

GDPR fines can scale to a company’s yearly revenue. They can absolutely get in more trouble than it’s worth if they keep blatantly shitting on the GDPR. Keep reporting them whenever you see these violations.

There’s a really low bar for what is considered personal data. If they collect location data coupled to an “anonymous” ID, it’s still personal data, because it shows you moving to your house and place of work every day. If you can infer a person’s identity from the data, it’s personal data.

So yeah them collecting your personal e-mail address and refusing to delete it is a clear violation of the GDPR.