וַיֵּ֥רַע אֶל־יוֹנָ֖ה רָעָ֣ה גְדוֹלָ֑ה וַיִּ֖חַר לֽוֹ׃
But it displeased Jonah exceedingly, and he was angry.
Rashi
Now it displeased Jonah—He said, “Now the nations will say that I am a false prophet.” [from Pirké d’Rabbi Eliezer ch. 10]
Abarbanel
...Jonah became depressed and wanted to die, because ... while they had repented from their evil ways in beliefs and deeds, he saw that they continued in their idolatry, and did not repent for their sins against God...