It could have been. I, like every teacher I've spoken to, have my textbook frustrations. I worry about the places where they deviate from my own philosophies, the times when they seem to talk down to my students, the times when they seem to talk over my students' heads, and--perhaps most of all--making sure that I use them enough to justify the (often astronomical) cost my students incur by purchasing them.
But I'm not going to bash textbooks.