At the end of chapter 9, there is still some hope for Egypt. Their livestock is dead along with their flax and barley, but they still have some wheat growing. Now the locusts eat the wheat too. Egypt will be without food until the next harvest. Darkness falls when Pharaoh says he never wants to see Moses again.
It’s hard to imagine Pharaoh being this stubborn. Hopefully you have not experienced it yourself, but you may have someone in your life who, no matter how bad things get, never changes his or her ways. Don’t give up. God isn’t done with them and you can keep encouraging and praying for that person to turn to God.