performance improvement process after burnout leave
I returned to my job after a long-term leave of 4 months and they immediately announced that a performance improvement process will start based on the latest performance assessment during my absence. For the last two years, I have been working under a very difficult manager who has bullied and morally harrased me for a long time. Under his management, I could not perform at all due to his behavior and I was working under fear and micromanagement. They now informed me about the process that was commenced immediately after my return. Is there any action that I can take or should only start immediately looking for a new job? I know that I can make an official complaint to the safety advisor and I can also inform the union but is that something that will help? Is there anything else that I can do?