How had Stanley been treated by his teacher and students at his school Holes?

In "Holes," Stanley Yelnats is often bullied and mistreated by his classmates at school, facing ridicule for his name and his family's misfortunes. His teacher, Ms. Walker, is also unsympathetic, reinforcing his feelings of isolation and frustration. This treatment contributes to Stanley's low self-esteem and sense of being an outsider, setting the stage for his transformative experiences later in the story.