Could you expand more re: your minio experience? We're about to enter production with minio as our S3 interface-providing file storage system, and have found documentation to be sufficient.
However, I'm slightly concerned that we haven't tested it enough, and that doc and support may prove to be lacking (like in your case) when we hit edge cases and failure scenarios.
No LTS version. Bugs will be fixed in a new version, which may include new bugs. Some upgrades need full cluster restart. If you ask too many question you may get "it's better start a subscription".
We've been running for about a year now and had zero problems with it. (~20TB total, few single instances, serving as S3 backend to Restic - handmade HA - backup service)
However, I'm slightly concerned that we haven't tested it enough, and that doc and support may prove to be lacking (like in your case) when we hit edge cases and failure scenarios.