Complex sentence: Teachers, friends' parents, schoolmates and girls all idolise him, despite his sociopathic tendencies--the cruel games he plays with his family and friends, in particular those closest to him, his girlfriend Michelle Richardson and best friend Sid Jenkins.
Split into simpler sentences: Teachers, friends' parents, schoolmates and girls all idolize him, despite his sociopathic tendencies. He plays cruel games with his family and friends, in particular those closest to him, his girlfriend Michelle Richardson and best friend Sid Jenkins.