I understand the frustration, however he works properly. The situation is caused by his passive, that increases his attack with HP loss.
The only thing I can suggest you to prevent this kind of situation, is to ask your server's top 15 players in ranked battle to move hidans to other teams (not main character team). Other than that, you may try to keep him controlled, so that he does not move.
Note: This post has been filtered by Daiske (Administrator)