Disclaimer: Naruto isn't mine
Being a dad means believing you have about two weeks to get all this figured out-and then eighteen years later, realizing you still don't have it all figured out.
When Naruto announced he was pregnant, Sasuke was happy because that meant clan time and seriously, how hard could raising a kid be? Two weeks after the baby arrived, Sasuke would be on covers of parenting magazines everywhere.
So when two weeks passed after Kyoko was born and Sasuke still hadn't appeared on the cover of any parenting magazines(although he would eventually) and he still hadn't had a decent night sleep(although he would eventually) he wasn't the happiest man on Earth. He was top of his class he had everything figured out. Why couldn't he stop a baby from crying then?
And then when Kyoko was eighteen, when Sasuke had been on plenty of covers of parenting magazines and slept for eight hours each night he couldn't figure out why he couldn't let her go. He had been a great ninja and was the most emotionless man during his teen years and now he didn't know what to do. It was like the start of parenting all over again.
It really pissed him off.
Author's Note: The last line doesn't mean Sasuke is pissed off at parenting but at the fact that he once again isn't in the know how of everything.