Yes, disappointments in people are a part of life. Even the best of therapy relationships involve disappointments, where the T isn't there for you in exactly the way you need it exactly when you need it. Even the best of marriages or relationships are disappointments from time to time, because people can't always live up to their commitments and circumstances change. People aren't robots and life isn't static. The ground under my feet always feels like it's shifting. But as I get stronger and go after what I want more, the disappointments feel lighter and easier. Maybe I focus more on what I do have, not what I don't. But I'm kind of a hopeless optimist and positive thinker anyway.

Point is, how are you going to change given this change in circumstances? Maybe you don't need this therapist, you just need to do something different so you can afford to have a wider variety of therapists you can choose.