Hello, it's good to hear from you again.
It sounds like you have been experiencing transference with your therapist. It is not necessarily your therapist that you feel these things about (though it feels that way, very much so) but instead these feelings that you have are about unmet needs from your past.
When you start therapy, your therapist purposely keeps her personal life out of therapy. This is so you not only have the chance to focus on you, which is what therapy is for, but you also can take unresolved feelings and put them on the therapist- called transference. This allows the therapist to help you resolve these needs through identifying and bringing out those feelings which you have carried with you since the trauma, neglect
or abuse occurred in your life.
What it sounds like is going on here is that you researched your therapist until you found something that made you identify with something from your past. In your case, it was anger about something you did not agree with in your therapist's life. While normally what your therapist does with her personal life would not concern you, because you had this unmet need you put it on your therapist. One possibility is that someone in your past did something that hurt you and that caused you to feel hurt and angry about what your therapist did because it brought out the same kind of feelings you had before. But whatever happened, this was your way to try to work it out in therapy.
However, it does not sound like your therapist has caught this transference going on so it is going unresolved. Now that she is ending therapy with you, you feel abandoned and hurt. Part of that could be that you still have emotional ties to her with the transference. And another is that you still have unresolved issues.
You may want to bring this up in therapy during your remaining sessions. It can help a lot to deal with transference issues with your therapist, the person you are transferring these feelings onto. You may not be able to completely resolve the issue before you have to end, but you will at least begin the process. And since your therapist will not change her mind about continuing to work with you, you may have to finish your work with another therapist. But in the end, once you work this through, you will feel a lot better.