Carl Jung wrote a suffering classic. The Problem of Job raises the fundamental human question. Is suffering necessary? Somehow someone recommended the book to me in my time of agony. Jung's father was a high ranking Lutheran bishop so he was raised in a sophisticated household that must have been very unlike the Witnesses. Jung analyses the story of Job and finds God lacking basic human morals. The book is an extraordinary indictment of Christianity.
There are other points of view. I know from personal experience what Paul called "the folly of the cross." Suffering is a human lot. Sometimes when you are deep in pain, projecting suffering on to a god is powerful. Roman Catholics cling to crucifixes. Protestants show a cross without a body to show the triumph of Christ. If I had a say, there would be no suffering.
Adam did not exist. Today I read the Gospel of John again. The NIV translation has clear statements that Christ existed before the wrold was created. Indeed, Christ was the agent of creation. The NWT probably has some fraudulent translation. If a significant portion of an early Church taught that Christ existed before creation, I doubt that Christ had much to do with Adam. I ponder. Unlike the WT, I see no answers.