I Have been Reincarnated As a Lazy, Arrogant Noble, but When I Destroyed The Scenario Through Effort, I Became The Most Powerful With Extraordinary Magical Power Chapter 18 Discussion

His goals changed partway from avoiding destruction with hard work, to bullying the protagonist to expulsion because he doesn't like him.

I hate it when authors suddenly change characters for the plot. They stop feeling like characters, but puppets on a stage performance by a very indecisive writer.