This "employee" is also the
very person who chose to A.) Block President Trump and B.) Ban the story about Hunter Bidens's laptop from the New York Post, which was declared real by the NYT two years later.
Furthermore, Elon did not berate her by name or handle, he just said that what Twitter did was "obviously incredibly inappropriate" with a link to a story mentioning her, even though he did not mention her by name.
She's calling it abusive, not because Elon called her names (he never mentioned her, just the story) even though she was behind the biggest bans and censorship. She's upset that her power has been exposed and she might have some accountability for her decisions.
For how powerful she is, imagine if we weren't allowed to criticize the President, or a member of Congress, or Jeff Bezos, or even Elon Musk himself because it might hurt their feelings. When you are in a position of that much power, criticism must come with it, and you don't get to complain about that.