as cole lays bleeding, he thinks to himself"What luck....(t)o end up on an island with a stupid bear that didn't have brains enough to run away." Has cole realized his responsibility for what has happened?

No, Cole still has far to go before he takes responsibility for his actions. He sees his predicament as the bear's fault or even Garvey or his parent's fault. Cole must realize that his actions alone effect his own universe. This includes his encounter with the Spirit Bear.