Uc essay help!

For the “what is your biggest challenge?” prompt I wanted to write about living in my older brother’s shadow and how despite my efforts, my parents failed to praise my successes because my brother was always one upping me (something along the lines of this) and then I would go on to say I overcame it by discovering my individual strengths and weaknesses and by not seeking validation from anyone idk

I have 2 questions

  1. is this a cliche topic and too overdone to the point where its not worth it
  2. how could this possibly have helped my academic achievement?