Do you realistically think the Washington Post or The Guardian would make Snowden look bad by aligning IC asset fatalities with his leaks? I doubt it.
Consider this: IP addresses and devices of Western assets were leaked in the documents. Counter-intelligence can use those to correlate known or suspected IC assets. This has real-world consequences.
The way Intelligence works is much more shrouded in secrecy. Everyone in the know knows he had privileged access via his job and leaked the entirety of the documents without redactions because he was mad at being passed up for the TAO job. His bosses were interviewed which confirms my statements - 1
Swift on Security is an example of a Twitter account with connections to IC. Her statements on the subject echo how the industry feels about Snowden. - 2
1/ https://slate.com/news-and-politics/2016/09/what-snowden-get...
2/ https://twitter.com/SwiftOnSecurity/status/64971712356500684...
Also your Slate.com link contradicts your explanation for his ostensible disgruntlement - Ctl-F "TAO offered him a job". Not that it ever made the slightest bit of sense in the first place - who would banish themselves from their homeland over that? Snowden's character study is as crystal-clear as it is inconvenient to the NSA: the man was an idealist.
Can you point to a specific article in the Washington Post or The Guardian which you believe lead to casualties?
(The rest of your comment is rumor, wild speculation, and in the case of 'lowly sharepoint admin', outright misrepresentation)