I'm really sorry to hear some of your stories from your interaction with the Typeonegrit group.
I'm a member of that group and they can be very supportive, knowledgeable, positive group of people.
I do admit that I don't always agree with their ways or behaviors online outside of the group itself. Especially the whole "bombing the comments/feed with graphs, charts, images and memes" instead of taking the time to answer legitimate questions. I think that kind of behavior can be very off-putting for some who otherwise might be more open to trying low carb as a way of achieving better control.
I do see it sometimes as a defense mechanism by some people in that group, as they spend so much time defending themselves in front of doctors, medical staff, family members, etc that they develop these automated responses to the point they just don't bother actually articulating an argument.
In any way, let me please apologize on their behalf. They are a group of passionate people who mean well.
As for the initial topic over here, I will say that speaking from personal experience only, I seem to be more "carb sensitive" now than when I ate a high carb diet. However with that said, I don't know if I was quite in tune before as I am now, to any small change in overall BG. Just something to consider I guess..