Naïve people expect the media, particularly the prestige coastal media, to purvey objective facts in a reasonably non-biased manner. Obviously, the media fail miserably at that role, but it is one they no longer even attempt to convince people they are fulfilling. They see themselves as an elite, charged with shaping and guiding the opinions of low information voters. Their mistake was to drink too much of their own kool-aid and get so far out of step with the majority of the country that they are now distrusted and despised.
I think we make a mistake in longing for a time when the media did fulfill its responsibility in an unbiased fashion. CBS News icon Walter Cronkite was a fervent leftist, but he had a reassuring manner and hid his bias fairly well until he retired. So he was called "the most trusted man in America", which probably says more for the cluelessness of his viewers than it does to his dishonesty.
Media have always been biased. The fabled movie Citizen Kane laid bare the desire of media magnates to control the public.
Having a "free" press is a double-edged sword. We don't want government controlling the news, but when the entire media are all on one side of the boat, it is obviously problematic. The one counterweight, alternative and internet media, are now under vicious assault by Silicon Valley monopolists who are clearly on a mission to get rid of all conservative internet media. They have already bought off much of the republican congress and Conservatism, Inc think tanks, so all we hear is "they are private companies, you know" and "we can't tell them how to run their businesses."