Takeout admin menu: https://admin.google.com/ac/customertakeout
Solved! Go to Solution.
You’re very right—Takeout is known to be horribly unreliable. And since it’s not a “core” app, it’s not possible to get support or report bugs.
Common advice for using takeout includes not even attempting to use it with large accounts, and also only attempting to export data from one service at a time (export your mail messages, then export your drive, then export your photos, etc.). It’s a pain.
There are quite a number of third-party backup solutions available for Workspace that work far more reliably, if that’s what you’re looking for….
Hope that helps,
Ian