At a point in the beginning God looked at creation and he “saw that the wickedness of man was great in the earth, and that every intent of the thoughts of his heart was only evil continually.”
This evil desire and thought from man is sin, it is not of God, it is the choice void of God. Described above is the state of mankind.
The result of sin is death. This can be physical death, like a victim of a murder or spiritual death which is how everyman lives until they accept Christ.
Suffering on this earth is a consequence of sin. Believer or not you will suffer and you will go through pain and hardship in many ways. It may last your whole life or part of it.
Job 35 verse 8 “your wickedness affects a person…”