Like @Oggie suggested, really his campaign is failing because the guy's personality doesn't resonate with his potential voters.
The rest of what @mcnado said doesn't really apply because his voters don't live in the same reality, they don't think that list of complaints is actually true, so they don't judge him based on them.
He just doesn't have the charisma to capture the voters living in that reality, and that's why he's failing.