"Google Drive is better than Duplicity and Carbonite"
This is an odd sentence because Carbonite is a provider and Duplicity is a backup software that you can point at many different providers.
So Google Drive might indeed be superior to Carbonite but that has nothing to do with Duplicity.
Further, there is almost universal consensus that borg is superior to duplicity. It has been called the "Holy Grail" of backups[1].
What you should probably be doing is:
1) using 'rclone' to move data between clouds[2] - either downloading it back to yourself or migrating it to a new cloud that you prefer.
2) using 'borg' to initiate, or replace, existing backups with encrypted backups that only you hold the key to.
As you may know, there is a cloud storage provider with this half-page privacy policy[3] that explicitly supports both borg and rclone[4] and has those tools built into their environment.
[1] https://www.stavros.io/posts/holy-grail-backups/
[2] https://rclone.org/
[3] https://www.rsync.net/resources/regulatory/privacy.html
[4] https://www.rsync.net/products/rclone.html
