QUR'AN 93:4 "And verily the Hereafter will be better for thee than the present."
Only Allah knows fully His Will. We finite beings cannot grasp fully His infinite Will and Wisdom. He runs His universe the way He deems fit. The Qur'an tells us that Allah is Wise and everything that Allah does is right, just, good and fair. We must submit and surrender to His Will. The Qur'an has not given us all the details about Allah's Will, but it has enlightened us with the guidance that is useful and sufficient for us. Allah did not make this world a permanent world. This is a temporary world and everything here has a time limit.