Two things stand out for me. The first time I started to lose a little faith, was when an endocrinologist told me I shouldn’t let (type 1) diabetes run my life. I had been recently diagnosed and having wild swings in my blood glucose readings because my insulin dosing was way too high and every time I corrected with the (recommended) dose of 15 carbs of orange juice, I seesawed the other way. Felt horrible all the time.
The second time, just this past year, a different endocrinologist recommended I change my insulin to carb ratio to 1:30 so I would stop having lows. That would certainly have resolved that issue, my current ratio is 1:9 with an average daily dose of 17 units.
Learned 4 years ago (diagnosed 5 years ago) that I was my best consultant about how to best treat my diabetes. Largely with the help of forums such as this one…and lots of research. My last A1C was 6.1, With a time in range consistently at better than 85%.