Charts that show media bias are largely irrelevant - and they presume bias is present accross the board. Sometimes the truth is unflattering to one group - that doesn't mean the people reporting it are biased.
I would be more interested to see a chart that shows media accuracy.
For example:
You'll find plenty of news outlets that truthfully point out the fact that Donald Trump Jr met with Russian operatives to discuss his father's political opponent. This is an unflattering story about one party....and it is also a true story. Is the news outlet that reports this true story suppossed to be labeled as biased for reporting truth? You'll find plenty of people in that party who believe so.
You'll find other news outlets that untruthfully say the Clinton Foundation only gives 10% of its donations to its core chartibale works....or Obama faked the unemployment numbers. These are bullshit stories that are unflattering to one party. The news outlet reporting bullshit should be called out as such.
When google search results start yielding more of the latter examples we should be concerned. In the meantime people are just pissed the media is truthfully reporting on unflattering events to their cause. Cry me a river.