Dune is soft sci fi. TBP is hard sci fi. They're very different formats of stories. Good hard SF generally doesn't have character development. In fact character development is a kind of subgenre called bildungsroman. I don't know why ppl these days expect characters to change as though it's some inherent part of a book. Some books are thought experiments or about world building. Part of reading for me is to try experiencing something novel. But on your hate for TBP, I'd say the huge fanbase, the Hugo committee and Obama would disagree with you on that one.