They hide the "Delete My Account" outside of your account, and link to it on some 'help page'. Some help.

So, here's the link: https://help.uber.com/h/24010fe7-7a67-4ee5-9938-c734000b144a

You have to "beg" for them to delete your account. It's not automatic. But I have a feeling that once they do so, and marking them as spam in Google would do even more damage.