Coinbase Is Unrecognizable

Trying to change a phone number is impossible. Backup phone numbers aren't useful for 2FA. Customer service recommends deleting your account instead of changing your phone number, that is after they've wasted 30 minutes of your time on security theater. A 2FA method is used to delete itself. Yubikey isn't supported by Coinbase Commerce, making using it a liability and self-defeating.

You can't buy and use funds immediately. There's a 9 day wait to use funds even the smallest amounts from PayPal.

It's totally defeated its purpose for transactional convenience.

Better off with PayPal or Zelle.