For over 20 years I was promotable, well reviewed, well respected, often asked to be on transition teams. I was more than competent. Suddenly, I was stupid. My boss badgered and belittled me while refusing to document anything. Finally, I snapped. Does this sound like you?
Tell us about it. I think there is a pattern of abuse that we can take to a lawyer. Please participate. Management fears this talk above all else (cause they're too lame to fear their own incompetence).