Is suicide considered despair of God's mercy, even if the despair stems from oneself due to an affliction feared to be a punishment for the prayer of an oppressed person or for sins, and is there a way to lift an affliction resulting from the prayer of an oppressed person?

Suicide is one of the greatest major sins and most heinous destructive acts, and it is often caused by despair of Allah's mercy. No reason justifies suicide, for the soul belongs to Allah, and no one has the right to destroy it. The cure for the fear of an oppressed person's supplication is to remove the injustice or seek forgiveness from the one wronged, not suicide, which does not remove the injustice but rather increases sin. The cure for sins is sincere repentance, for the door of repentance is always open, and one should hasten to repent instead of fleeing from one sin to a greater one.