Di was a wretched, disgusting, horror and yes, barking mad!
Oh, I disagree that she was disgusting or a horror. She was beautiful and charismatic which is why the press followed her everywhere. She was a nut but those aristocratic families turned out nuts on a regular basis.
She was well-liked by the historian Paul Johnson who could not influence her to mend her ways - she was headstrong from all the attention she received. Too bad; she could have been a Queen Alexandria if she had tried. But maybe she just wasn’t smart enough or mentally-sound enough. She had almost no education, which made her somewhat unfit for the role she took.