What I think about when I think about act three

Well that escalated quickly! I could not have predicted Polonius's death. Poor Ophelia! Hamlet is single handedly destroying her life. Now I know the lengths Hamlet is prepared to go to to exact revenge. I feel like lots of secrets are about to be revealed. I don't think anyone really seemed to care about Polonius. Is this supposed to say something about what kind of person he was?