What do you think the news has been for the last 100 years (or longer)? It was never unbiased. The news has always pushed the agenda of the entity that owned it.
For instance, is Trump in league with the Russians? What are the facts? On the other side, did Hillary break the law with her email server? What are the actual facts? In both of these cases, you can trace the points of argument ad nauseam, and an unbiased observer can come away with a feeling that both sides of both of these issues make good points. I know it's not a popular position to take on HN, but that's the way I feel about AGW. I think both sides have good points, and I don't know what to conclude.
I'm not entirely clear that it's completely nefarious. I just think we've reached a point as a society -- almost like a Maslow hierarchy -- where any problem we discuss is so complicated that there are (at least) 2 sides to anything worth discussing, and they make internal sense, and the difference is the worldview you bring to the argument.
With the drubbing the major news outlets took being COMPLETELY wrong about the last election, I think they've squandered the last bit of trust people had in them as objective reporters of fact. And, if it's all about opinion, then people are either going to reinforce their biases, or simply check out.