I think he'll go through with it, because in the end he can pretend that the system failed him. Or, if through some miracle any of it ends with a verdict in his favor, he can use that to claim that he has been vindicated. But as you say, he has painted himself into a corner. I don't see a way that this ends well for him, because there doesn't appear to be a scenario where he can silence his critics. And since he cannot bear to ignore them, he will instead continue to empower them, making it more likely that people who support him will find out who he really is and take their money elsewhere.
I mean, imagine that the court in Croatia delivered guilty verdicts against the seven. What happens next? Nothing. Well, here is what happens- every time one of them criticizes him, he will look powerless. What will he do, demand that they turn themselves in? Threaten to file another toothless criminal complaint? Appeal to the Hague? Nothing. He cannot do anything. And that is if he somehow got the best outcome, which is virtually guaranteed not to happen.