I think it may be because you have things you want to say to him. Even if you know what you have to say won't change anything, you still feel the need to tell him what you think about this situation. I don't really think there's anything wrong with that.
I know when my youngest daughter was going through her ordeal and was still living with me, she seemed to feel she had the right to say whatever was on her mind, regardless of how hurtful it might be, and it was very hurtful. However, when I would try to respond, she would cut me off. Stifle me, and it was infuriating.
I think it's human nature to feel the need to get our feelings out. I'm not saying you were right or wrong, but I certainly understand.