Everyone keeps putting Ebisu down, saying "Kakashi was so cruel for just dumping Naruto with him". Ebisu is good! He's an elite Jounin teacher, specializing in teaching future Hokage candidates. Just because he's a little eccentric doesn't mean he isn't worthy of teaching Naruto. If anything being taught by him is a privelage.

It seems like most people in the Konoha community probably weren't aware that Naruto could even access the kyubi chakra, that's probably why Kakashi or anyone else never tried to teach him. Remember in the Haku battle, Kakashi was shocked that the kyubi chakra was leaking out. Then in the Neji battle, everyone including the Hokage were shocked that he was able to even access it.

Maybe when Jiraiya attempted to teach him to use it, he didn't really know if it was possible or not, and it turned out he could use it.