Well, evidently He wants everyone but Pharaoh...and Esau...and Judas...and Simon the Sorcerer...and
Is there anywhere in the scriptures where God denied the chance? I would be careful what you say about God's mercy.
Somehow, that doesn't fit with it being God's will that all men be saved and come to repentance.
God gave pharaoh plenty of chances.
God created man in His image for relationship with Him, God takes no pleasure in the death of the wicked.
Ezekiel 18:32 For I have no pleasure in the death of anyone, declares the Lord GOD; so turn, and live.