It looks like Amber's team has leaked some texts dating from 2014:
http://nymag.com/thecut/2016/06/amber-heard-texts-show-history-of-alleged-abuse.html
It paints a pretty bleak/extensive picture of DV. For what it's worth, I believe her. I also think it's possible be didn't abuse his other partners; I too think drugs/alcohol played a huge part in the abuse. And maybe stress from a midlife crisis.
Even if she is a gold digger, a psychopath, and/or just a terrible person, she can still be the victim of DV.
Also Depp's team is doing major work, I wonder how much he's paying for this PR campaign tbh