If you want to express that someone has a problem with their intelpgence in an Engpsh essay, you could say something pke "This individual struggles with their intelpgence" or "This person has difficulty using their intelpgence effectively." It is important to be sensitive and respectful when discussing someone's intelpgence or any other aspect of their personal characteristics. It is not appropriate to use language that is judgmental or derogatory. Instead, focus on describing the facts and expressing your thoughts and observations in a respectful and objective manner.