I can remember all of the button pushing that my xh did over the years and I do think some of it comes from being passive aggressive, but MLC made it far, far worse.

I did learn that the more you ignore the behavior, the more they ramp it up until they come to realize that you aren't going to bite. Then they'll start on another tactic of being very nice and will go back and forth to find the key to open your door to reacting. As hard as it is, don't react to them. They are trying to find justification for the way they feel and for what they are doing.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.