There's a good reason why Clinton's ads were all focused on Trump and his personality. Extensive polling and focus group research conducted by her campaign for months revealed a big problem for her: If she focused on issues, she'd lose badly for a number of reasons (her long track record in government with nothing to show for it, for example). And the research they did showed that the best way to beat Trump was to make the campaign about him, not the issues.
Something else that just occurred to me is that Clinton made one huge mistake in attacking Trump for his personality, demeanor and conduct: she assumed that voters would see this as an attack on his character, but it really wasn't. The anecdote the author gives about overhearing the conversation in a NYC coffee shop is a good example of this.
“she assumed that voters would see this as an attack on his character, but it really wasn’t”
It was right in line with the Media Image and Caricature the Media had already created about him, for twenty years, so it couldn’t gain any traction outside of people that were already set against him.