Before you go to the intake sessions, you may want to bring a copy of the Consumer's Guide To Therapist Shopping
with you. Delete the questions which do not apply to you and add any additional questions you may want answered.
Take notes, not only about the answers, but how they were given, as well as your impressions of the therapist (open, warm, confrontational, guarded, etc.).
A good therapist will not mind answering your questions. The prospective therapist will be open to discussing any concerns you have.
If the prospective therapist counters your questions with defensiveness (why are you asking? etc.) then that is probably not the right person for you.
Obviously, there are some questions which cannot be immediately answered. But you will be able to tell by the tone of voice and the therapist's body language how they are reacting to being questioned.
A good therapist will interpret this as a way to engage you. A lesser therapist will interpret this as a challenge of their skills and may even feel threatened by the questions.
You had a good therapist. You will recognize another one.
I am sorry you had a bad experience with that therapist, but happy that you got out of the situation.