Cael, 
I would agree that the press coverage is anti-Trump, but I would not say it's left-biased.  The two are different.  
And, as you so eloquently point out, there is not much positive to write about, so I'm not quite clear on how the press could be pro-Trump.  Unless, of course, the coverage were to be into race-baiting and white supremacy, etc, etc.......