All media are biased on some subject or other. And bias is not inherently bad, as long as they wear their colors openly. You just have to be aware of those colors, and let that tint your perception of what is being reported. Instead of taking one news agency's outputs as gospel, read a bunch of them and compare what they say.
I would love to see more of the ideal of journalism where journalists are exclusively reporting on the facts, and any kind of opinions or analysis is left as attributed quotes. It may still be biased by who you attribute and who you don't, but it's so much purer than what we see in today's media. That kind of journalism is almost non-existent. Sadly.
There is a saying - never attribute to malice what can easily be attributed to incompetence. I find this to be pretty accurate when it comes to journalism. It's not that most journalists are evil truth-twisting sleazebags hellbent on ruining the lives of those of a different political alignment than themselves. It happens, but it's in my experience a very rare specimen. Most journalists are idealists, for better or worse. They want to make the world better, and they want to expose the corruption of society. Most journalists literally live for the once-in-a-career moment where they bring catch a person of power doing something they really really shouldn't be doing.
But journalists also have a day job that require them to fill a quota of news, and that quota keeps on increasing year-by-year in the name of profit. Quality is the first sacrifice in that ordeal. Getting a second confirmation of a source - not happening - you have 3 more news stories to write before you can call it a day. This makes it really really easy for propaganda to seep in. Some government agency sending out a press release saying X, you're gonna print it without fact checking - you can't afford the time to fact-check the government. And even if you did some fact checking, some other news agency is going to print it, and everyone else is going to pile on "X happened! (according to other news site Y)" and you'll be super late with the news. It literally only takes one bad apple to then ruin the entire industry in the quota-driven environment.
There certainly is propaganda going on, but I do not think it is that deliberate from the media's side (most of the time). Ask yourself who is feeding the media propaganda stories about IS or north korea. Because it sure as hell ain't the journalist with a quota.