I might sound unsympathetic but, it's no wonder your diabetes team treat you like a child, because you sound like you're acting like one, you are the only person who can help you, try taking this advice from someone who's had this condition for a long time, grow up and stop feeling sorry for yourself.
If you want to have any quality and length of life, start taking this seriously, I don't believe for one minute you are "forgetting" to do blood sugars and taking your short acting insulin, it's more like you're choosing not to. You might be getting away with it to some extent at the moment but you won't for very long believe me, I've known two people who did what you are doing, one is now blind and the other one is dead from kidney failure.
It is a nuisance and can get you down at times but I'm afraid that's life, I've had this for 48 years since I was four and with the knowledge and technology in place now, you can, with effort and care, live a virtually normal life. I'm proud to say that's what I do and so can you.
There's a saying that goes, "don't waste your life waiting for the storm to pass, learn how to dance in the rain."
Best wishes
Gill