My suggestion is we stop using "main stream" when referring to CNN, MSNBC, ABC, CBS, etc.
Just my two cents but calling them Main Stream really isn't accurate any more with Joe Rogan, Russel Brand, and other pod casts easily pulling in more viewers than the legacy media of CNN, MSNBC, ABC, CBS, etc.
Plus just the "Legacy Media" name it self may catch with normies and help shape the fact that the legacy media are the old way and on their way out.
The word legacy usually has positive connotations. I’d prefer just “fake news” or “propaganda outlet” myself. Factual and descriptive.