I suspect OP has not really lost access to their own files. Per the blog post about this system [0], "When it’s restricted, you may see a flag next to the filename, you won’t be able to share it, and your file will no longer be publicly accessible, even to people who have the link."

My guess is OP has multiple accounts, created this file on account A, and can no longer access the file while logged in as account B, so it seems to be "removed from Drive." But I could be wrong, in which case I agree with you, this doesn't make sense as an anti-spam measure.

https://workspaceupdates.googleblog.com/2021/12/abuse-notifi...