Speaking as someone who spent a decade working in sports media, my opinion is that Kaepernick's antics go beyond simply annoying and cross over into clear lack of professionalism. As a class, sports writers are super easy to please. You just give 'em a couple quotes and send 'em on their way. Even cliches will work in a pinch, but just the tiniest touch of sincerity goes a long, long way with writers. It's easy and costs *nothing*.
Guys like Kaerpernick and Coach Douche and Belichick take a different tack. They go out of their way to be sh!tty to people who are merely trying to do their jobs. (Jobs that aren't without benefits, mind you, but jobs that aren't as easy as you might think and jobs that by and large don't pay overly well.) And this is just unacceptable, and really, not forgivable since the alternative -- choosing to be a man and not an a$$hole -- is so simple. It's just a matter of courtesy and humanity. Millionaire entertainers who can't sack up, do their jobs properly and treat others like they're actual human beings are beneath contempt.
It's all fun to pile onto the media, but we should keep in mind something when we do it. Most fans cannot attend games. Therefore, without media, there is no game. There's no league and there's no fans. It's all linked together. Big time sports and sports media are really one connected symbiotic entity which relies upon the health of its component parts for its overall happiness.