Bismillahir Rahmanir Raheem. In the name of God, The Most Gracious The most Merciful. The ones that went through the most difficulties and hardships from the human beings are the Prophets and Messengers (peace be upon them) of Almighty God. The prophets and Messengers (peace be upon them) went through the most difficult of times and were also the most loved human beings to God. Basically in Islam, from the proofs of Islam, it is known that when God tests a believer with a hardship, it's to purify him of his or her sins, and during the times of difficulty in life we must show patience to pass the test. A man go through the most difficult life, show patience and be sin free on The Day of Judgment. Compared to another sinner (as all human beings sin) that has a cakewalk of a life and then on The Day of Judgment has a ton of sins on his record, for this person, he will have his difficulties and hardships in the afterlife, and the punishments of the afterlife are far more severe compared to the difficulties of this life. It's actually much better to be tested in this life, than have to go through the punishments (graveyard trials, Judgment Day trials, hellfire) of the afterlife.