Grats on the A1C!
Here’s a recent discussion that talks a bit about that:
https://forum.tudiabetes.org/topics/damage-occurs-after-140
Now, as far as where your peaks and valleys occur, like you said, what’s typical for everybody else may not be what’s normal for you.
In 25 years of BG testing, I rarely ever peak 2 hours after a meal. My peak is closer to 1 to 1.5 hours after a meal. I try to keep it under 180 and shoot for around 140 if possible. At 140 postprandial, I’ll have subsequent lows in the high 50’s to low 60’s, but I can deal with them and they are usually close enough to my next meal where it just means a lower Novolog dose to cover.
Oh, and I’m on MDI. Gonna talk to my endo about a pump next month.