deranged (adjective)

1. In the novel, the protagonist's deranged mind leads him to commit horrific acts of violence.

2. The deranged supervillain terrorized the city with his insane plans for world domination.

3. During World War II, Adolf Hitler's deranged ideology resulted in the genocide of millions of innocent people.

4. The movie showcased a deranged character whose twisted obsession with revenge drove him to madness.