There are number of reasons why God allows hardship & adversity to befall people. Even the genuine believers experience hardship & adversity at some stage in their lives in accordance with God's wisdom & Grand Plan.
Thread..
Do the people think that they would be left to say, "We believe", without them being tested ? Quran 29:2
also:
We will surely test you through some fear, hunger and shortage of money, lives and crops, so give the news to the patient ones. Quran 2:155
To pass the test, the believer must maintain his belief that only God can relieve his hardship. The believer will always maintain his prayer and call unto God:
Quran 9:103
If you count God's blessings, you can never encompass them. The human being is indeed transgressing, unappreciative.
Quran 14:34
Quran 10:22
Quran 10:23
"O people, you are the ones who are in dire need of God, while God is the Rich and Praiseworthy One."
Quran 35:15
Quran 39:49
Ameen 🙏🏾