Hey Tenzin, it's been a while since we heard from you - glad you decided to drop in here. I think many people go through this, so don't feel that you are alone, or that you have 'failed' somehow. Living with a chronic condition like diabetes can be difficult at times as it can feel like there's no escape. Bear in mind though: you may be able to ignore it for a time, and feel fatalistic about it and what it may do to you - this is why it is such an evil thing, the consequences of ignoring it may not be truly felt until some real damage has been done, and it is often at that point that the regrets begin - when it may already be too late for some aspects of your health.
Don't feel overwhelmed by everything - pick one small thing that you can improve and work on it. Don't think of it as something you have to do for your diabetes, do it for your health generally, like going for a daily walk or some other exercise - make it part of your routine. Don't let diabetes sneak up on you - sneak up on it instead! Start making a food diary, just so that you can look at it in a week or so and see if there are any areas where you might be able to eat more healthily, or reduce portions, or cut out a snack that you might only have eaten because you were bored. In this way, you're not doing things for the diabetes like being forced into a diet because of it, you're doing it because you want to feel better about yourself.
It might be worth going back to your doctor or nurse and explain how you have been feeling. It's very common to feel this way, and they may have some helpful suggestions or can set out a plan to help you.
You can always come here and tell us about the things that get you down about diabetes - we will understand and it can help to put it into words (as you may have already found by writing this!). 🙂
Try and keep it simple and worry about fine-tuning with all the exotic advice when you've got a proper handle on things.