I do not believe either side as a whole, nor have I said that during this current discussion. I am talking about the fundamental realities of the situation. Depp asked a court to decide is his guilt or innocence by the legal standard set out in civil court. That is what the lawsuit basically boiled down to him asking whether a judge believed he is a wife beater or not. The judge, who knows more about this case then any individual here or on the internet, said yes, there was enough merit to calling Johnny Depp a wife beater.
The reality of the situation is that Depp got himself branded a wife beater by a count do to his own decision making. You can say you don't believe he is one, and that's your decision. Maybe he will win his appeal, maybe he will win his US lawsuit. This does not change the reality of the current situation that saw WB fire him. The likelihood of that happening if he had not pressed with this vanity project of a lawsuit is pretty close to zero. So as I, Snow Queen and B have pointed out multiple times, this is Depp's fault he lost his job at WB. If Heard keeps hers, I would also put that on Depp, because again, he is the one who got her branded as a battered wife in the court of law.
You wanted to know how this is Depp's fault? That is how.