A lot of people have great hope, and a lot of people who have great hope live. And, some of them who have great hope die. So it's not that hope is going to save you.
I think it's a little simplistic to explain a work through the psychology of its author. In other words, that Haneke has emotional problems, so I don't have to take his films seriously. By using this argument, the viewer retreats from the challenges of the film.