Some differences between Naruto Childhood and Boruto's:
1.- 15 years has passed since 4th war in Boruto and 12 years since 3rd war in Naruto. This causes a bigger development in the village. New standards.
2.- Konoha was not allied with no one except barely Sunagakure in Naruto and in Boruto everyone is allied. This shows no more internal missions with other villages therefore they just need to concentrate in creating more stronger ninjas and more security to just focus training.
3.- Naruto and Sasuke did not have parents. Reason why Naruto was fodder at the beginning, with some training we knew that Naruto also was a genius. Sasuke learned the Katon while his dad was alive. But then? No more Technics. Ino, Shikamaru and Choji already had there clan jutsus just as new gen. Nothing new. Iwabe has been in academy for to long reason he has great jutsus for academy.
And the main difference in the academy, is BORUTO he is the one that makes his friends achieve a new level unlike in Naruto where no one were real friends and no one helped each other. Here in Boruto, Kakashi even said that Boruto is the reason that the academy kids are growing except that they lack of a real goal. Also, Iruka was a chunnin, what can a chunnin teach. Shino is a Jonnin and is better.
4.- Other things.
1. Missions are better for you overall than just straight training, real life scenarios make you stronger, that's why Hashirama's generation were so much stronger, they were having to fight from early on and having to develop their skills.
Naruto was not a genius, he had to train hard to get to where he was, and even then he almost never won a single fight without the 9 tails involving himself.
2. Naruto doesn't train with Boruto, nor does Hinata, because Boruto doesn't have the byakugan. In fact Boruto doesn't seem to do ANY training outside of the academy, he spends all his time eating cheeseburgers, playing video games and collecting trading cards, yet he's stronger than Naruto, and stronger than even Sasuke before he recieved his curse mark, despite sasuke being a genius, who trained every single day and was the reincarnation of Indra!
3. The Ino, Shika, Cho trio are much stronger than their parents were during even the chunin exams, ChoCho can use the partial expansion jutsu, which choji couldn't do even during the chunin exams, he could only turn himself into that boulder thing, Shikadai can not only use his shadow jutsu much better than shikamaru, and for much longer, he can also use WIND STYLE jutsu like temari, and Inojin can use super beast scroll, and the mind body transfer jutsu. THESE ARE KIDS WHO'VE NOT EVEN LEFT THE ACADEMY.
*Edit*
Also sasuke isn't ever around so how has Sarada learned so many shuriken jutsu and fire style jutsu?
Also Inojin on top of knowing, super beast scroll, and mind transfer, he knows MEDICAL NINJUTSU. Which requires amazing chakra control, and years of training, Sakura and Ino didn't even start attempting to learn medical ninjutsu until the end of the first Naruto series.