Every technical issue has some particulars that make the incident unique so without the details I can only make general observations. VMware recommends not using a VMware snapshot for more than 72 hours, ref the KB 1025279 below. Recovering the files from a NetApp snapshot is normally not a problem. VMs with snapshots are just files on the disk. There certainly can be issues with a VM having corrupted files. Per VMware KB 1006585 “File corruption is random in nature.”. If a large VM snapshot was consolidating and stopped it can cause the VM to be corrupt and unusable. I have seen very large VMs that took days to consolidate so it can be tempting to attempt to stop the process. If there are issues with a VM once the files are recovered I would suggest a support case with VMware Support to address any issues. NetApp support engineers provide assistance to our customers for issues outside our products but we do not have some of the escalation resources a vendor will have for their own product.
Best practices for using VMware snapshots in the vSphere environment (1025279)
https://kb.vmware.com/s/article/1025279
Corrupt redo log causes errors within the virtual machine while powering on ESXi (1006585)