retro your issues aren't trivial. I feel anyone's issues here, no matter how big or small they may seem, still matter since they affect you and your feelings which are important since you matter. I don't often reply to people since I have only been in therapy for two months so I don't really have too much experience with it.
Have you told your T about these feelings of disappointment along with the other feelings you mentioned? If you haven't maybe you should bring it up to your T in your next session. I'm sorry you're upset about this. Hopefully this gets resolved soon and you begin to feel better.