Help them work through the pain, not ignore it. Of course you don't want to stay there indefinitely, but it is part of the process. Too often, Christians think the questioning part of the process is wrong. In fact Martin Lloyd-Jones makes that statement in his commentary on Habakkuk. This is an impossible statement.
People have feelings and questions.
You either suppress them or express them. There is a balance between self-pity, hopeless resignation and staying mad at God. As usual, the correct response is somewhere in the middle. Habakkuk has received one answer, and he had more questions. He is searching for understanding.