Easy. They hate him, but many of those that can’t stand him and think he’s doing a terrible job vote for him because they conflate his power as Senate majority leader as Kentucky’s power. Seriously. I’ve had conversations with Republicans that hate what he does, and some of them thinks he’s such an insufferable asshole, but when I asked why they keep voting for him the answer was always, “if he stays in the Senate then KY has power in Congress.” They never make the connection that the only time he gives a shit about Kentuckians is during re-election. Nor do they make the connection that his votes hurt the vast majority of Kentuckians.
They also elect Rand Paul, tho. One state = Two of the most obnoxious, self-important, lying, hypocrites in the Senate. Kentucky is the problem.