Your suffering is a great enticement to Satan. He and his anti-God federation are irresistibly attracted to persistent pain. Notice how he obsesses over Job’s misery. Notice how he shows up in the wilderness at the height of Jesus’s weakness (Matthew 4:1–11).
Satan is savvy enough to know that his lies are less effective during prosperity, so he waits until life is hard and we are more vulnerable (though he has plenty of weapons for our good times as well). Then, when he suggests that God does not love us, he suddenly sounds compelling. In other words, we need all our wits about us when suffering comes our way.
Does God love me? Am I suffering because I have done something to incur his displeasure? These can drift into questions about God himself. Is he good? Does he hear? Does he care?