In Job 15 Eliphaz is clearly insulted by Job’s comments. He believes that Job is arrogant and full of iniquity. He believes that Job is receiving and will continue to receive punishment from God for his actions.
In Job 15, 16 and 17 Job answers saying that he could speak against his friends or he could try to assuage their criticism but he is too tired. He is grieving over the losses he has incurred. Job believes that God has caused all of this and pleads that God would treat him as humans are to treat their neighbors. He recognizes that his friends are not sympathetic and those around him mock him. He is drowning in grief.
Psalm 83 is a song of lament. All of Israel’s enemies have come against it. The psalmist asks God to seek vengeance against them so they will know who is Lord.
Psalm 84 speaks of how wonderful it is to live in the presence of God.