The downright hatred from many on the right for Rodham Clinton (that's for Cannoli - he has a point on the first name thing, but of course it'd be rather ironic to call her by her husband's last name as a sign of 'enlightenment' ) is pathological, not explainable in any rational way that I've ever seen. But she does have obvious weaknesses as a candidate, and plenty of people dislike her for valid reasons.

Perhaps more importantly, there is a clear trend in American elections towards stronger party-based voting - you often see that in Senate elections where even Senators with a strong individual reputation are less and less able to buck national trends during a particular election in favour of one party or the other. They will both get a huge share of their votes from people who just hold their noses and vote the party ticket, and who would have done just the same if it had been Cruz versus Sanders.