Not even "real" support, I once subscribed to One to have 1tb of space in Google Photos, couldn't invite family members, after going back and forth with the support for 2 weeks they couldn't find the issue and just refunded me my subscription.
I attempted to get an issue fixed with backups not working. The first 5 emails were the google moron telling me how to start a backup, ignoring my clear communication that I'd run a backup and it didn't backup my data, as was clear by the space usage.
The next 5-7 emails terminated when their suggestion was to remove the password from my phone. I'm not sure why that could have helped, but regardless, I can't have my phone without a password.
One counter-example: An acquaintance was recently able to restore an important Google Drive document they accidentally permanently deleted using Google One's support (this is possible within some time horizon). Best $2 they'd spent, apparently :D