Moonkin, please do remember that depression is guiding your thinking. If you've been depressed for that many years, and gone through that many doctors, I can surely understand your doubts and frustration! I hope you can keep trying to work with this T, take the med, and hang on for better days.
There is a lot that doctors do know. They don't know what you don't tell them about yourself and your experiences and how you think about them personally. They aren't mind readers.