The problem is they know Trump is insanely corrupt and incompetent. It's not like they can run on the fact that he's honest, good at his job, has lots of accomplishments, is well liked, etc. Their only outlet is 'buh buh buh HILLARY'.
They admire Trump for getting away with it. I confess to having a little bit of it myself. Imagine getting away with 10% of the shit Trump has pulled in his life. OTOH, I never was so foolish as to think he wasn't trying to con me along with the rest of the world.