How to prevent abuse of the account/password-based signup

I keep running into those users -
who mass-register accounts in every possible way.

It’s honestly getting exhausting.
Has anyone dealt with this before using auth0 or something similar?

email email_verified provider
sdfsdsfsdf@gmail.com FALSE auth0
sdfasdf@gmail.com FALSE auth0
xxxsdfasdfsd@gmail.com FALSE auth0