It is incredibly painful to be rejected, unaccepted by those closest to us. They have a strong impression of us in our old roles, our old presentation, and will deny what we are, sometimes coming up with amazing rationalizations.
It hurts. It really hurts.
Worst of all is that they don't seem to see how their rejection hurts us.
My wife at one point claimed that I was just 'doing this' because I didn't have enough to keep me busy in retirement. She's claimed the therapist had convinced me I was trans. She thinks it is all about 'wearing those clothes', and has refused to listen to any actual medical information. It is very frustrating and bothersome.
You aren't alone. It really does hurt, and your feelings at being denied acceptance make sense. It's one of the nastiest parts of transition.