Who is the red herring in the book Holes by Louis Sachar?

In "Holes" by Louis Sachar, the red herring is often considered to be the character of Mr. Sir. Initially portrayed as a harsh and antagonistic figure at the juvenile camp, he appears to be a primary obstacle for the boys. However, as the story unfolds, his true motivations and the larger context of the camp reveal that he is not the true villain of the narrative, which adds depth to the plot and character dynamics.