You should be proud of yourself for a whole variety of reasons that I don't even know about yet, but let's start with what I do know.
First, you had the courage to seek out answers and you found a great place for support @ TuDiabetes.
Next, you had even more courage to write a blog post titled, "Out of Control" - where you honestly expressed your worries - wow! I could never do that!
Additionally, you pointed out the steps you ARE taking to manage this disease. Insulin, testing, counseling with a therapist and parents who love you. Remember, that they are upset because they care about you. Indeed,they may be struggling with their own demons because they feel responsible for your T1D.
Keep working with your therapist to set reasonable goals. Start small and the big things will fall into place. Remember that you are on a long, long journey. It has been said that "the journey of 1,000 miles begins with the first step."