he would also have to prove there was intent to damage
Not only that, he would also have to prove that actual damages were caused ... that weren't due to his own livestream.
No one else has any control over his patreons. If we did he'd have none whatsoever.
He probably wishes his patreons were devoid of their own free will to donate or not, but the vast majority of normal people find behavior like his repugnant, which is why he's haemorrhaged support.
He doesn't actually have a business that provides any real service. It's all based on soliciting donations and making content and it's easy to show he's not been doing that.
i.e. all the damage he's suffered has been self inflicted.
He should sue himself. He might finally be a success at something.