They are both awful, but he's the worst of the two. From the evidence playing out in court it's pretty clear both were abusive and each has struck the other (she admitted it on tape, he admitted in a court of law that he headbutted her. I'm not buying that it's possible to headbutt someone by 'accident'. The UK court clearly didn't buy it either, as they found the Sun's wife beating allegation to be substantially true). All that said, the only one claiming they're a wholly innocent victim and only one party - the other one - was abusive, is Depp.
Having read his suit and her countersuit, I believe both. Hers seems pretty much irrefutable. He's been [mis]using the legal system for years to carry on abusing her with a seemingly legitimate basis. This is an abuse of the system. Civil courts exist to pursue one end: restitution for harm done, the sole recourse being payment of damages. They are not there to 'clear your name' - that's the purpose of the criminal courts - and they're certainly not there to pursue someone relentlessly and enact petty revenge against them. If legitimate questions are opened up about the abuse of the system in this way - the two daft WAGs and their stupid internet argument being another case in point - that will be one good thing to come out of these pointless trials.
The more Depp uses the courts to continue pursuing Heard, even after losing the UK defamation trial, the more he seems to justify her claims of abuse. Given he's voluntarily showing himself up as everything she says he is, he can't be any too bright. As for those hate-filled texts, a decent human being simply couldn't entertain sentiments like this.
#Team Depp/Heard is obviously asinine. No matter who comes out of this case the victor, both have already lost. With any luck they'll be rendered unemployable and this will be the last we hear of them.