Passage
But this was a great evil to Jonah, and he became angry.
But this was a great evil to Jonah, and he became angry.
Jonah 4:1 But this was a great evil to Jonah, and he became angry.
Jonah 4:2 And he prayed to Yahweh and said, “Ah! O Yahweh, was not this my word to myself while I was still in my own land? Therefore I went ahead to flee to Tarshish, for I knew that You are a gracious and compassionate God, slow to anger and abundant in lovingkindness, and one who relents concerning evil.
Jonah 4:3 So now, O Yahweh, please take my life from me, for death is better to me than life.”
The verse centers on "great", "evil", "jonah", "became", and "angry". It is saying that the verse draws attention to "great" and "evil", so its meaning should be read from those terms before moving to application.
The next verse adds "And he prayed to Yahweh and said...", so "great" and "evil" should be read forward into that movement. In Jonah context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "great" and "evil" with trust shaped by these words, not by a vague optimism outside the passage.