Hey NewSmoke,
I am sorry you are feeling so down.
Many older therapists/pdocs are aware of the issues dealt with by people in the Trans* community.
I am not a therapist but I am very aware and have worked with many people while they are questioning or transitioning -- and I am almost 60 y.o. My teachers/mentors (from the Trans* community) are older than me. I am not Trans*, yet I am very interested in supporting the Trans* community.
The age of your therapist may not be as important as how interested and motivated your therapist is in supporting you. Many older people have more life experience and are more open-minded than some younger people.
That said, it's important you feel comfortable with your therapist.

WC
WC