It is mostly self-inflicted, though. He chose that exile over facing justice for these charges.
And calling systemic judicial prosecution "torture" is most certainly hyperbole. It's the job of the judicial system to prosecute people who break the law, and it's definitely better if they do so in a systemic rather than arbitrary way.
So while it's entirely possible that Assange shows symptoms of torture, the question remains who tortured him. For a long time, by his own choice, it was only the Ecuadorian embassy that had access to him.
And calling systemic judicial prosecution "torture" is most certainly hyperbole. It's the job of the judicial system to prosecute people who break the law, and it's definitely better if they do so in a systemic rather than arbitrary way.
So while it's entirely possible that Assange shows symptoms of torture, the question remains who tortured him. For a long time, by his own choice, it was only the Ecuadorian embassy that had access to him.