Rehi Jason,
thank you for the replies. As far as I heard, when people are classical trained, and then want to "switch" to jazz, they sometimes find it difficult. And teachers may have spotted, that these "switchers" have a classical, but no jazz background. If that's accepted by your teacher, maybe he, by simplifying stuff (downgrading chords, e.g., as you said ), does this for the purpose to help, but therein not considering the effect on the psychology.-
I read your other thread, too. And I think we should consider the fact, that a new area of interest won't be learned in its full scope quickly.
Look: If I say "Teachers, please teach me quickly to play like Art Tatum or Fats Waller!", then they won't succeed if they start teaching already very difficult content.
But an interesting option for you would, I think, be, that you hire the jazz-teacher you found in the web (but first check her formal education, bio, everything, and talk to her before!! Via talking, many things could perhaps be cleared up a priori). And then take these lessons parallel to your studies. And don't quit the studies at university. That's what I really wouldn't suggest.
Let's shapeshift into the person of your teacher:
I think, your entrance examination, which consisted of classical playing, was very good (otherwise, you wouldn't have passed, I think. Nowadays, only very good "entrancers" pass. The requirements, at least here where I live, have so increased, that my mother's schoolmate, who after her first degree (final examination, in Germany) became pupil of Cortot, said yeeears ago: "When I finished my studies (= in Germany), I played as final examination the HR II of Liszt. But nowadays, one must play such stuff as entrance examination!" - And she said this some 35 years ago, on a jubilee-meeting of their normal schoolclass, to my mother! ).
Your teacher may have thought: "Ok, since all of them are very good, I can start with more difficult stuff," but he didn't realize the problems of "switchers" too well before, so then he "went the mentioned steps backwards".
But it also is possible, that he simply isn't a good teacher, or, more exact: isn't a good psychologist.
Because the effects of communication-style may not be clear to him.
Talk to him, honestly, politely, and sincerely, but hold your standpoint, and ask exactly for the "Whys" and "Whats"! A teacher must in every case be able to answer reason and purpose for his teaching.
Very cordially, 8_octaves!