well, well... i see your problem.
when there is no feedback to our violent effort at the instrument it can easily be disapointing. of course that actually you don´t need any external approval if you don´t want to go pro, but in the formative years, when you need to construct your critical parameters about the instrument, the repertoire and its technique/interpretation...yes, comments are mostly welcome.
my first suggestion would be: change your teacher. about that, a couple of notes.
take care to not get caught in a trap. there are teachers who can only work with children/early teenagers focusing on a career or the like, that´s it, "great goals". they are neither interested nor able to help any other kind of musician (disregarding the ones who just can´t teach and rely themselves upon the natural talent of the students). in that case, you must find a teacher specialized in adult musical education. and be sure: there are professionals like that.
however, i understand that a change of yours could create some personal problems. well, life ain´t easy but there´s a light in the end of the tunnel...

are you able to record yourself playing piano? if so, do it and post it in the
audition room here at the forum. you will probably have some interesting comments and advices (and since nobody knows anybody, there are no external influences. at least, not much

).
you seem to have the will to play, to like music and the piano. it´s very common to people destruct that in a bad musical environment. don´t let that happen to you!
hope that helps a bit, and good luck.