This answer is accurate but no one seems to realise it. Under standard contracts users waive their rights including privacy rights under GDPR. Their are no user agreements anymore, only contracts.
Your own IP address?
What's the point of having personal data if you aren't allowed to make decisions about it
Your body for instance is probably better protected in terms of chemical additives, healthcare and now pregnancy choices, but you can't easily sell body parts or be a surrogate.
If a service operator decides they don't want you using their service, they don't have to let you use it. That only gets murky around protected characteristics (race, sex, gender, orientation, etc) which "privacy" is not.
They could make access contingent on being allowed to process your data.