When I see these story's about Kaepernick in the media, it seems they focus completely on the social/political ramifications of his actions and ignore the fact that Kaepernick just isn't a very good quarterback.

In 2015 he went 2-6, had a 59% completion rate and was benched.
In 2016 he went 1-10 and had a 59.2% completion rate

In the playoffs, back when he had a good team around him, he still only managed to get a 58% completion rate and threw 5 interceptions in his 6 games.

Teams have kept QBs that have been accused of rape, domestic violence even cheating in the Super Bowl. His political stances wouldn't matter if he could make a team better because he's on the team. Teams would be rushing to get him if he were a proven winner. He's not.