"if it was made into a movie..."
Many parts of the Bible have been adapted for cinema and television. The Biblical story of Jesus sacrifice was very graphically portrayed in a recent movie by Mel Gibson. I know of many Witnesses who outright condemned the film without ever seeing it.
"Who are we? Why are we here? Whence evil? Are things ever going to get better?"
Does the Bible really answer these questions, or do people make up their own answers and then use passages in the Bible to back them up? I highly recommend studying some real Biblical scholarship. Richard Friedman's Who Wrote the Bible? is a great place to start.
"Who are we? Why are we here?" We are somewhat intelligent animals that eat, reproduce, and die. Want more than that? Study anthropology, biology, history, paleontology, astronomy, etc. You and I are so fortunate to live in a time period with so much accumulated knowledge. Read, study, and USE it.
"Whence evil?" There is no absolute Good and Evil. Once again, read and study sociology, psychology, philosophy, ethics, and neuroscience.
"Are things ever going to get better?" Paradise? Utopia? Forget about it. Make your life as good as you can make it right Now. NOW is all there really is. Ever. The future and past are just abstract mental constructs. Besides, when you and I die, it is over. I have yet to read of any evidence that a consciousness can exist without the neural network of the cerebral cortex to create it. Brain damage effectively alters consciousness, therefore brain death eliminates it. Of course, in the long term the astronomical sciences show that eventually all life on Earth will die as the Sun gradually expands in its later life stages in a couple billion years or so.
Dave