User blog comment:B214/High School DxD EX/@comment-73.46.6.122-20150729200920/@comment-79.175.64.126-20150729201524

He isn't that arrogant. He just want to save Asia and he doesn't like that his father is too kind towards their enemies aswell.

Experience doesn't have anything to do. Issei will have plenty of exp with dragon powers aswell, it's just there is a reason why Ix dislike his father.