I would say my insomnia has perhaps negatively impacted by relationship with God, i.e. the devil has been modestly successful in tempting me during episodes. I think of Samuel being called by the Lord (cf.
1 Samuel 3:1-18), and have tried praying similarly, but God has never communicated with me during any period of sleeplessness except insofar as I chose to read from the Bible, the Catholic Encyclopedia, the Summa Theologica, etc. In other words, the apparent pointlessness of not being able to sleep, the apparent lack of interaction with God during these times, and the apparent lack of God’s help in returning to sleep or remaining asleep is positive evidence for atheism.
Of course I offer up this suffering as well, so only God knows the spiritual ‘net gain’ resulting from these problems.