I watched a lot of SCOTUS nominee hearings over the years. Starting with the Bork hearings in 1987. [Yes, I am that old]
I've seen some exceptionally prepared judges at these hearings. Thomas, Scalia, Roberts, Alito, Kavanaugh, Gorsuch, ACB were all well prepared for the grilling they knew they were going to get. They all acquitted themselves admirably, especially Kavanaugh, who was subjected to an unprecedented amount of hate.
Never in all the years I've been watching these has a nominee looked this unprepared. She didn't prepare herself and it looks to me like she either thought or was told she could just bluff her way through.
She didn't expect members of the Senate Judiciary Committee would thoroughly research her writings and opinions before this hearing? Confront her with her own written words? She's been burned 3 times on that assumption so far, this last one by Cruz leaving the biggest burn about CRT.