I don’t purport to be a journalist. But I am highly selective of the journalists I trust. Sources like O’Keefe, Loomer, Huffington, gatewaypundit, dailykos, et al., are untrustworthy and have established themselves as such. Only fools accept their brand of journalism because they know such “journalists” will deliver the message they want to hear.
Or maybe you read or watch with the knowledge of the sources bias, and maybe shifty methods of getting the information or getting it out.
There is nothing wrong with being partisan or producing propaganda, the problem comes when it is misrepresented as "neutral, fair, balanced" etc.
Nothing wrong with taking sides, plenty wrong with claiming you have not taken a side.
And that is what the MSM doesn't get about people's mistrust of it.