The text strcture characterizes Walter Mitty as imaginative, cowardly, and poorly treated.
To begin Mitty is imaginative. He gos in and out of real life and daydreams. He starts the story in a dydream of a plane, then is being yelled at for driving too fast.
Secondly Mitty is cowardly. He will not stand up for himself. When he is being yelled at by the parking-lot attendant he just accepts the scolding
Finaly he is poorly treated in real life. He gets made fun of were he gos. the grage man smiles at him when he has to take off the chains. The woman walking down the street made fun of him for saying puppy biscuts
In "The Secret Life of Walter Mitty" the text structure makes Mitty Imagenative, cowardly, and poorly treated