You need a different therapist. There are some out there that deal with chronic condition patients. Early on this is a roller coaster ride. Some of your stress comes from the novelty of this situation. It is a lifestyle-altering diagnosis. That being said, it is entirely do-able. Some peace of mind comes with experience. After a while, what's going on isn't new territory any longer and you get to realize that all those threatened complications aren't here (yet) and that once you get the hang of it, it's going to be a lot easier on you. There's no doubt about it, this is a big upset to your apple cart.
Now that you've had the diagnosis, take a breath. All the bad things are NOT going to come to your house at once. There are some new activities you need to necessarily fold into your daily routine. Monitoring and management is your job. I fought that principle for a long time. What the hell are doctors for if not to take care of you and make the bad things get better? Diabetes doesn't roll that way. It is very much a self-managed condition. So, in response to that feeling, I didn't do any more than was absolutely necessary. I wasn't going to let this rule my life. I was wrong. My eyes started to bleed. Not to encourage you, but I had been a diabetic for nearly 20 years before my eyes started to develop diabetic proliferative background retinopathy. I could have avoided this if I had just been smarter about it.
This is manageable once you gain a few skills. Carb counting and insulin dosing are skills. Monitoring and administering correction boluses takes a bit of experience and judgment (and you are going to get this every day no matter what). You can build upon your knowledge base as you go along. Knowledge is power (trite, I know). The more you know about how your body reacts to things, what tends to spike you, what doesn't seem to be all that disruptive, the easier you will find it to roll with the punches.
You really will be okay. Get involved in your care. If you can work with your endo and an educator use those resources. I can guarantee you that once you start taking charge, you will feel a lot better. My depression was alieviated a great deal by grabbing this bull by the horns.
Your experience with your parents needs to be separated from you. You are not your parents. From their mistakes you can learn. Those examples do not have to be emulated. You can be successful at this.
Also, you are not alone. This is home base. Here is where you can seek the guidance of the elders. A little patience on your part is necessary, too. You have to give yourself a break. You bet it's a lot to take in and there's much that you have to do adjust. Be patient with yourself. Getting BGs in range can take a bit of work early on. Don't look at unexpected highs as a failure. They aren't. I still get a clench in my stomach when I find that I'm high. I still have to talk myself down sometimes. But you can learn from it. Come here and ask advice. It's pretty much free and usually delivered with a great deal of understanding.