I find the idea that there can be an unbiased news source deeply problematic. All reporting of an event has to be from a perspective, and has to make decisions about what to report, what to leave out; what to emphasise, what to play down. An honest news source should be one that is one that is honest about its own biases.
What has changed is the mainstream media used to care a lot more about being honest. Now they often couldn't give a toss.
I don't mind media being partisan, it's always been so, and often it's revealing to see the reporting from both sides of an issue, and add the FT's take for the financial slant. I do mind that we're rapidly running out of sources that care about being honest. Murdoch ruined the Times, the Barclay Brothers ruined the Telegraph. Both now far more opinion than news. That's a loss, whatever your politics.