I understand your frustration at being ignored all that time
@nessa1970 No wonder you're angry and upset. Unfortunately, misdiagnosing an adult onset Type 1 as a Type 2 is surprisingly common. I wish doctors wouldn't make assumptions based on age.
But whatever you feel about your doctors, don't let your anger at them be misdirected and hurt you. When it comes down to it, they don't matter. Only your health matters. So don't control your BS for them - control it for you.
You've reported a reading of HI on your meter. That's really worrying. That's means your blood sugar is higher than 33mmol - so high your meter can't read it. That high sugar will be damaging your body. I think you know that in your heart, but it does need saying. Even if you avoid DKA, such a high sugar is 'poisoning' your body. Your weight loss shows this. It's not normal weight loss, it's the result of your body starving for lack of insulin and breaking itself down. It will also be partly the result of dehydration as your body desperately tries to pee out the excess glucose.
I understand your concerns about your weight, but you're not overweight and your previous weight probably wasn't your normal weight because if you've had high sugars for a while before diagnosis, your body may not have been able to use the food you ate. I reckon I had Type 1 for a few months before diagnosis, or at least that my pancreas was failing. I had a number of infections as my body was run down. I was also very slim and had lost weight even before the final push into full-blown Type 1,
Not taking insulin is a way to control weight (see the Diabulimia/eating problems section here) but it comes at a potentially huge cost... I could link you to any number of stories showing that, but I'll leave you to google. There is psychological help and support available if you feel you're at risk of that. There's also a website called DWED where you can read more.
Insulin and the right diet for you is the way to go. You can choose appropriate meals and then adjust your insulin to match them.
I know you were doing well with carb counting, etc. That was fantastic and a huge turnaround that you should be very, very proud of. Don't let a few highs make you feel down or like a failure. They happen to us all. Just correct and move on. No one can be perfect - we only have to do our best.