Yeah... And the second source cited in article, VChK-OGPU "outlet" is an anonymous channel in Telegram, that published information from "an anonymous source". Doesn't sound trustworthy.
He's a Pro-Ukrainian Mil-blogger which at first blush would seem to suggest he's a good guy, but, one of the first things that comes up when searching the name is him claiming Russia was planning on attacking Japan (a country which has a defence pact with the US) in '21 which strains his credulity credibility.
he made loads of wild bullshit claims, all without evidence, such as that putin has terminal cancer, or reports of Ukrainians using weapons that were delivered only months to year later
Are you claiming Newsweek is not reputable? I bet you also think Fox News is fake news. Or New^s York Times is clickbait. News is right there in the title, game over. /s