What do you mean the partitions are “wracked”? The My Cloud is formated for Linux. To view the data on the partitions one has to either use a Linux distro or have the proper driver’s installed if using Windows 10. The following post/discussion deals with trying to see the contents of a My Cloud hard drive attached to a Windows PC.
If one wants to “unbrick” their My Cloud there are many past discussions on how to unbrick a My Cloud. Note that many unbricking procedures will erase all user data on the My Cloud.
https://community.wd.com/search?q=unbrick%20category%3A105
What other troubleshooting steps have you tried? Has anything changed on your local network? Are you using a new broadband provider? Certain routers have a specific issue with the My Cloud, see the following WD Knowledgebase article that explains that particular issue.