The reason why Naruto is so slow is because it has a lot of fillers. The reason why it has a lot of fillers or had is because the show was being produced before the mangas of the volumes were published, as a result, the anime didn't know what to do with the characters. 220 episodes if you didn't skip fillers like me.

Does Naruto get boring?

Yes, Naruto got boring after Sasuke leaves and the fillers started, but it started to pick back up a bit with Shippuden. . . . . . Now the whole freaking story started slowing down after Sasori's arc. I stopped watching after that because it got so boring and slow. Manga FTW!!!!!

Why is Naruto so slow in Boruto?

There are two main in-story reasons for Naruto's relative lack of strength in the Boruto sequel series. ... Naruto's goal as Hokage is to protect the village, and this involves more than just learning new moves. Secondly, the ninja world is currently in an era of peace, which has made the villages weaker in general.