How did a Kryptonian that was bred to be an intellect,
Jor-El was born on Krypton as a genetically engineered baby to become more intelligent and innovative, making him a more efficient scientist when he grew to adulthood. His engineering was evident as he went on to become the most prominent scientific mind on Krypton.
Beat an army guy, General Zod
Zod was born on the distant planet Krypton genetically engineered as a commanding leader and fierce warrior. He was one in a long line of warriors all who served in Krypton's military rising all the way to the rank of 'General' from which he was formally known as "General Zod" from now on. Zod was placed in charged of the Warrior Guild on Krypton and was fiercely devoted to his duty and his 'people'.
that was born and bred to be a military guy in hand to hand combat? Only after Jor-EL was distracted by his son taking off was Zod able to fatally would him.