Sad to hear, but thanks for the transparency! And for hosting this far.
For everyone else who's considering to move to another instance: I found these related GitHub issues:
- https://github.com/LemmyNet/lemmy/issues/506
- https://github.com/LemmyNet/lemmy/issues/1985
- https://github.com/LemmyNet/lemmy/issues/3040
There is also a "Subscribed communities copyer", though it did not work for me: https://sh.itjust.works/post/53184