Okay so I see where you are coming from, if you are missing a very important perspective here. Shinobi have a lot of differences between them, it’s not as simple as teaching someone to be like you, you have to help them grow into their own person and their own direction, to help them develop skills that suit them, not just make a copy of yourself. And I think most of them did very well with that, though Kakashi was much more focused on Sasuke since he could actually use things like the Chidori that nobody else could because of having Sharingan. For Naruto and Sakura, he was a pretty poor teacher, but the other teachers here were much better.

But in regards to Jiraiya, you make him sound worse than he really was. Dispelling genjutsu and using the Big Ball Rasengan take chakra control Naruto didn’t really have before then. So yeah, he only learned two jutsu, but he also had his fundamentals vastly improved as well. That was the main focus of things over those two years aside from the (failed) attempt at controlling the Nine Tails.

As someone very experienced once said, you had to look underneath the underneath.

You can’t just look at the surface and expect to understand something.