I had an interesting thought whilst watching Man of Steel again. Since Kryton was bigger the earth and had a heavier gravity it must take longer to travel around the sun plus the people were engineered which made me think of the Star Wars clones who aged at twice the rate of a normal infant and it got me thinking how old is Clark really?
How long was a Kryptonian day, a month, a year that it would match up with human aging? Is Clark really 32 years of age?
What if he's actually half that age. It would explain a lot but why does he look so old? Ape young age faster then human infants as a survival instinct. Krypton was said to always have been a harsh evironment and they have shown that Kryptonian children are smarter and have a higher awareness then human children.
This leads me to believe that Clark in the classroom was actually two and a half years old by Kryptonian standards, six and a half during the bus accident and eight and a half during the tornado. Cognitively he'd have the maturity of a human twice his age but emotionally he would still be his physical age.
All this means is that at 32 human years of age Clark is really only a 16 year old boy by Kryptonian standards. This is why Zod and the other Kryptonians treat him as inferior because he is just a child to them. This would put Jor-El in his physical twenties at the start of the movie and why he's kicking ass so much. And why Zod is still such an emotional a hot head.
It's like Grogu who is fifty years old but still a child by his races standards. It also means that Lois is robbin the cradle. Hell it would explain why he's so fixated on her too. He's an pubescent emotional sixteen year old in love (He'd probably have teenage acne if he wasn't under a yellow sun). Hell you can transfer this to comics and the cartoons and it'd line up perfectly.
Take Batman Beyond where he's supposed to be 80 yet looks like a 40 year old. This should mean that once he hit his physical peak he stop aging visibly thanks to the sun or it was just natural stopping point cause he's from an alien race of Supermen. Where you shocked when Aragorn said he was in his 80's. Same thing except he IS forty by Kryptonian standards.