To be honest, she ain't even that. She is a former lawyer who now reads from a teleprompter. An entertainer.
"lightweight"
It is quite possible that she does not hold her alcohol well. She is rather thin...
"not good at what she does."
Context. I have watched her show quite often and found her interview style to be rough and often shoddy. Were she to interview some of her guests as if they were on the witness stand, I think the dialogue would be much better.
Brzezinski suggested O'Reilly should have retorted: "excuse me? You're talking about her intellect? She's a lawyer . . . she's a mother of three. You do not undermine the credibility and the intellect of my colleague."
She was a lawyer and I am pretty sure her children are being raised by her husband and/or nannies. Further, she is a big girl and has said similar things about the Donald as well as others of note.
Concluded Mika: "where was that, Bill? That was lame!"
Compare your viewer share to Bill's.
W Bush was a lawyer and father of two, but I have no doubt that Mika thinks he was a 3rd rate president and a lightweight.
Having a vagina doesn’t change the definition of competence!