Office dynamics can sometimes be challenging, as individuals from different backgrounds and personalities are brought together to work towards a common goal.
The Original Poster is 20 yrs old female working at a major company. Even though the OP got the job through a scheme for disadvantaged young people, the interview process was complex.
This made the OP mad, and she said that she knows he is not nearly as competent as he believes and that he only got the job because his uncle is the CEO