[Ali Imran]

Aiyo.. why must beat them. If they want to go just divorce lah. No good to resort to violence.

No, it didn't say must beat them.

And our prophet said don't beat them, which means, don't let it get to that stage. Deal with it in the first 2 stages. In extreme cases, it's better to divorce than to hit her. Remember, God only allows it at the 3rd stage. 

This is a very complex issue. There is no hard and fast rule. There is a lot of scholarship on this verse alone.