Can you two tell me when you added stuff? And when you realised, they disappeared?
Currently writing an FAQ on the site situation. Any information will be helpful!
https://www.mangago.me/home/mangatopic/21255174/
I suggest not touching your lists right now if this is still occurring.
I don't think you completely fucked up your chances. If you know you rated/tagged works, you're likely to get them back. It'd probably just take longer. Site + list recovery is just taking longer than usual in general, probably due to the disk crash.
I get it, people got impatient and I don't blame you for following what others said.
People were saying recovery was finished (it wasn't) around Feb 10 and telling others to add stuff back to their lists. I listened and then saw people having issues. After that, I found some evidence that I believed showed they were still recovering lists too.
So, I'm sorry that you had to face this issue because others went against our advice. We can't 100% confirm nor deny if lists are safe to edit because we are not the developers ourselves. But with the history of issues I've seen, I believe my advice is still sound.
Thanks for letting me know more about your situation though!

Is the reading lists still not working? Bc I feel like some things I added after it all got erased are gone too