Okay, NightWatch, this is not the glaring obvious Troll or Spammer, but, it's not just the unpleasantness of the antagonistic poster, it's the fact that it's increasingly obvious that this MN thread is being used as a bitter battlefield between the OP and her ex.
Not honest, not appropriate, and really not helpful to anyone: neither them nor the MN community.
Could you consider hiding the thread, until more investigation is done?