In many ways, I agree with your critique of the media, even if you do seem to place disproportionate culpability towards the left-leaning media outlets [you appear to have a right-leaning political fetich].
Right leaning sources deserve plenty of criticism, but with regards to misrepresenting guns specifically, those misrepresentations come mostly from the left.
In terms of general criticism, I see the same underlying forms appearing on both sides, buttressed by the intersection with social media itself. I go into that here:
I don’t think either flavor of media can help itself. I think they’re trapped by game theory.