How to deal with a brother who misbehaves with my mother

How to deal with a brother who misbehaves with my motherCategory: ParentingHow to deal with a brother who misbehaves with my mother
Ash asked 3 years ago

My 17 year older brother mistreated my mother ,he has been following  the footsteps of my dad ,who insults her infront of us.my mother is a doctor with a great career bit my dad never takes her seriously enough. He ignores her most of the time and blames her for everything that goes wrong. 
Hes jobless currently and refuses to settle for offers on lower wages .
My brother has stopped going to school after his poor result and misbehaves ,disregarding any advice offered 
How to get him to get over his pride?
I need a detailed answer 
Thank you