I'm not convinced. You deserve to serve a minimum of 12 months of BMS hell. When completed, you deserve to be treated decently. Meaning, decently humiliated through a Written Warning period of 90 days or less, and then, if you haven't adequately done what they asked (and they will change how and what they ask of you), they will decently terminate you. If you're lucky to survive this 15 month period without giving them CAUSE to terminate you, you will get a severance package, but I wouldn't count on it.
You might be thinking that you don't deserve this kind of crappy treatment. You could volunteer to leave, but if you stay, you will join all the others that deserve every bit of it!