After reading the book I definitly feel like there was plenty of fault to go around. It sounds like there was definitely more than one 'yes-man' on the team although as Taymor's co-writer, Berger perhaps is most at fault for being a yes-man. Berger pretty much states that during the previews, no one wanted to really tell Taymor the honest truth about what needed to be done - maybe they were in fear of her wrathful temper, who knows?
I felt badly for Taymor in some respects: clearly developing and revising a brand new show under the kind of intense media and public scrutiny that Spider-Man had would take its toll on anyone. But it also sounds like she refused to entertain any of Berger's suggestions for revising the show, and was stubbornly against
making any major changes. That being said, I can understand how she would feel hurt, betrayed and blindsided after Berger, the producers, and the composers went behind her back and developed a plan to overhaul the show.
One little tidbit I found very interesting was the fact that Michael Cohl tried to block her from coming to opening night.
Overall after finishing the book, it really just sounds like an incredibly harrowing experience for everyone involved.
"You drank a charm to kill John Proctor's wife! You drank a charm to kill Goody Proctor!" - Betty Parris to Abigail Williams in Arthur Miller's The Crucible