If you watch Fox News, then you'll realize that the majority of programming on that channel is not actually advertised as news. Much of it is commentary. In contrast to CNN, which markets much of its programming as news, but it also is commentary.
What I'm saying is that Fox News isn't any worse than CNN, people just see them as worse.
News should be procured from multiple sources and sifted through to find the truth. Many people don't want to do this, so they take their news from wherever they think agrees most wholely w/ their views.
And the rest of Fox in general is actually quite liberal, but the stigma of Fox News, the channel, has seeped into the rest of Fox's companies as a result.