Why is Thomas so indignant because he couldn't get any answers from anyone after he arrived at the Glade? What character traits describe Thomas?

Thomas does not like feeling left out and wondering if something scary, terrifying, or fatal is waiting around the next corner. He does not understand the purpose of the maze and wants information. In a way he feels powerless; with the knowledge of the maze and its purpose and set up, he might have a way to conquer to the maze and deal with all of its frightening aspects.