Here are my thoughts: John Oliver is a funny chap. His politics are wack and I think he strawmans a bit much, but he's good for a few laughs. I thought he had some valid criticisms and some biased.
OAN, outside of the two shows they have, is pretty much a revolving loop of the same 1 hr of plain, vanilla news. Sure, the two hosts they have may be hacks but so what? That's the case with most news networks nowadays.
I'm also willing to bet that the players who are outraged are only so because they've been told so. Just like John Oliver's first point: the Capybara may seem pleasant, but if Pres. Trump likes it, then it's clearly evil and/or racist (evidence notwithstanding).
Lastly, Mike Gundy wearing a branded t-shirt proves nothing. Even if OAN broadcasted nothing but fake news and conspiracy, many things could be true: He could be woefully ignorant of the network's position, he could be wearing it ironically, he may believe every word they say and be a closeted bigot. Regardless, Chuba Hubbard's reaction and outrage is just wack.
I respect his right to voice concern and I've speculation that perhaps there are some preexisting issues with this being the tipping point... But if I'm taking it at face value, it sounds to me that Chuba is willing to risk a potential Heisman season over political disagreement (which may or may not even be accurately assessed). That's certainly his right, but I reserve my right to think that's dumb.