How is the injustice overcome?

In this novel, there are two key injustices. One is the problem of Dana Matherson bullying Roy Eberhardt, who is the main character. The other injustice is the plight of the burrowing owls on the construction site of the Mother Paula's All-American Pancake House.
The problem of Dana is overcome by a combination of factors. First, Roy stands up to Dana, which temporarily deters him. After his injuries heal, Dana is out for revenge until he encounters Beatrice "The Bear" Leep. Beatrice is loyal to Roy because of his help with her stepbrother, Napoleon Leep. Beatrice intercepts Dana's bullying attempts twice, and the piece de resistance is that she ties Dana to a flagpole in only his underwear. He is literally stripped of his power.
The plight of the owls is that they are going to be destroyed if the pancake house is built. Napoleon Leep, also known as "Mullet Fingers," goes on a vigilante mission to bring justice to them. But when Roy gets involved, he has a more legal way of solving the problem. Through the help of his father, Roy learns that companies have to file an environmental impact statement before building. He lets a reporter know that the environmental impact statement is missing, and the conspiracy is uncovered. The mayor had received hush money to make the report disappear because it found that there were mated pairs of burrowing owls on the property. The burrowing owls are a protected species in Florida. Chuck Muckle, the company's vice president, is consequently demoted. The company's stock takes a nosedive after the story hits The Wall Street Journal, and to save face the company donates the site as an owl sanctuary. Justice is served.