Sorry. I'm a psychology major, so it slips out sometimes.
The verse I provided didn't say that Pharaoh was an exception to the rule. And isn't the reason why you reject predestination because it claims that God predestines some for Hell? But here, it looks like you're acknowledging that at least one was chosen for such a purpose.
The Pharaoh was not the only example, either. Paul also brought up Jacob and Esau a few verses back, whom God chose one to love and one to hate before they were even born.
Also, here's some other verses to consider, in no particular order:
Romans 8:28-30
Ephesians 1:4-6, 1:11-12, 2:8-10
John 6:44, 6:64-65, 12:37-40, 15:16
Acts 4:27-28, 13:48
Proverbs 16:4, 16:9, 16:33, 20:24
I Peter 2:7-8
Genesis 50:18-21