Okay, I am not an expert, but I have read several UNSYMPATHETIC accounts of Snowdon's actions that specifically and categorically contradict what you say here when you assert that "He ignored the legal process for raising his concerns."

Last I checked, the consensus was that he raised concerns repeatedly within his chain of command and then attempted to go over it, so much so that there was a process begun to review his actions for discipline/reduced security clearance.

He did not ignore the legal process for raising his concerned- the legal process for raising his concerns FAILED, and, as widely acknowledged by those who should have had oversight (but did not effectively have it until post-Snowden) after his leaks, those concerns should havs been taken seriously by that review process, but were not.

Furthermore, you must understand this: the damage that Edward Snowden caused to the United States was no more and no less than desperately necessary chemotherapy, because the NSA had grown CANCEROUS, and I'm absolutely not convinced it has been cured totally, though I'd be happy to see information otherwise.