I think You should really ask yourself, are you doing this piece justice? are you playing all the right notes with accuracy, are you playing the piece musically? If you are happy with what you played, and you see no need to improve than I don't know what to tell you, but to say that you are really missing the whole point of playing music. Listen to Richter or Horowtiz, or whoever on youtube, and listen to what makes their performances so special. I know most of us will not play like that but it's what most classical pianists aspire to.
It's good that you have the drive to play the piano and even attempt to try a very difficult piece, but if you want to improve you really have to be willing to listen to yoruself and listen to people's criticism.. Most people here are giving you similar advice for a reason..
I hope you can go back and listen to your recording again.. I mean really listen to it with a critical ear and think about it.