Called to another world and still hated. FINE! I'll destroy you all

Nero is always bullied by the whole school. One day, the whole school is summoned to another world. They get a job, except for Nero. Considered a failure Nero was sold into slavery and worked as monster bait. One day, Nero died when a slave stabbed him and his body was thrown into a ravine. "Jobs have been determined. Jobs have evolved. Jobs have been defined. 'The dictator Necromancer' has been successfully assigned to the individual: Nero."