For what it's worth, Amanda Peet's character is reportedly based on a real person who attained the equivalent position at CBS a few years ago despite being a perky young woman who a lot of people didn't quite believe as a network exec either. So to an extent, the unbelievableness is part of the point.

Also, I found her somewhat more tolerable in ep 2 than in the pilot. Mainly because she carried herself with quite a bit more confidence and self-assuredness in the press conference that opened the episode than I expected based on the stunned deer-in-the-headlights act she affected for most of the pilot.