I'm really happy for her. Worst CEO has typically been a male dominated category. It's nice see some diversity in lacking empathy and having over inflated egos.
In my book, the unsurpassed champion is Marissa Mayer. She was a product manager at early Google who dated Sergey and was promoted to VP. One of her accomplishments at Google was choosing the palette for the Google logo using a data-driven process. Based off of this success, she was made the CEO of Yahoo!, which she promptly proceeded to drive into the ground.
>On May 20, 2013, Mayer led Yahoo! to acquire Tumblr in a $1.1 billion acquisition.[53][54] In February 2016, Yahoo! acknowledged that the value of Tumblr had fallen by $230 million since it was acquire
She also covered up Yahoo hack, that was one of the biggest in history:
>U.S. Charges Russian FSB Officers and Their Criminal Conspirators for Hacking Yahoo and Millions of Email Accounts
Not easy to achieve that much on a single CEO position, without being forced out from a company