I'm pefectly aware the scenes I mentioned weren't in the novel. If you want slavish letter perfect reudctions of literary works go watch Masterpiece Theater. Spielberg did what an adapter is supposed to do. Honor the material's spirit but interpret it through the prism of the adaptor.
Even with your wide brush it sucked. It was poorly shot, badly edited and rife with confused plot lines. The only thing that was truly new and worthwhile were the cool sound effects. We can always rely on Spielberg for cool sound effects.