(1) Your comment should be in the question. You can [edit] the question. (2) If you managed to mount from the disk than maybe
ddrescue had not rescued everything it could. (3) "starting all over with ddrescue and …" – A good approach in the first place is storing the image inside a COW filesystem. You work with a reflinked copy of the image and in case of mishap you start fresh with another reflinked copy. In the same time you can ddrescue to the image until the disk dies completely or the image is complete, and hopefully get the best possible image for the next iteration with a copy.