The one constant in Hillary Rodham Clinton's public life is that her personal approval rating goes UP when she is out of the public view and it goes DOWN the more she is seen in public. It was true when she was First Lady of Arkansas, when she was FLOTUS, when she was a Senator, Secretary of State, and even when she was running for President. There were WEEKS during the 2016 campaign when she might have been hiding in a Tibetan cave, for all the public knew. And her favorability rose and fell on how much visibility she had.
And it remains true. Get her out in front of the public, get her into one of the debates, and her favorability rankings will tank yet again.
She is simply a nauseating public person. She might be a great grandmother or whatever, but as a public figure she sucks.