Brat,
IMHO, you are over-reacting about T-50/Su-57 and Russia in general. Not much less info in the (Russian) media about the machine than US and their allies (those concerned) discuss about F-35. Videos, interviews with pilots, designers, project management, stupid ones from the government and various committees, etc. It just became boring long ago (at least for me),which means that things are moving. But for those who do not know the (Russian) language, it may seem that everything is supersecret. I assume that this is the case with China, too.
Of course reports like US DoD DOT&E are not published here, but this is rather a US-specific feature to make such details open. You may call it "free society", if you like. But, IMHO, while talking about mil.stuff, such words are not applicable.