Hi - I'm guessing you're in the USA, from the post content. The UK doesn't do "total" and "net carbs". Carb values for UK food have already had the indigestible fibre, which makes up the "total carb" value, deducted.
As I've said elsewhere, I have found food Glycaemic Index values to be no use whatsoever. I checked it as a method after diagnosis five years ago, but dropped it within days. Foods behaved exactly opposite to what their GI value led me to expect.
I have to say that with the BG values you're reporting, that would be an automatic T2 diagnosis in the UK. On that, you're T2 for real. That means, as it does for all of us, that we have a problem dealing with glucose, and therefore the carbs that are digested to glucose.
If you're aiming to try low carb as a way of lowering BG, the issue is partly the amount of carb you're eating, and partly the impact that carb has on your system. It can be very difficult to estimate how much carb you actually eat. Averages can be tricky. There are carbs and sugars in lots of things - eg milk - that might not be expected. It is possible, if you're new to this, that you've simply not really been on 80g/day at all. That should be encouraging: it means there's scope for improvement, not that "it didn't work".
Sites like Dietdoctor (
https://www.dietdoctor.com/) are pretty good for their guides to foods and carb levels. My approach was not really to carb count, but to do what I'd done for Atkins - eliminate all high-carb items from my diet. I have a bit of residual carb from things like green veg and low-carb bread, and as long as that adds up to around 20-25g/day total I'm OK. I find that anything flour-based - pasta, bread, pastry etc - is consistently harder for my system to manage, and I get bigger BG rises from the same gram quantity of carb compared to beans or legumes.
The way to find all that out for yourself is through fingerprick testing before you eat and at +2hrs afterwards: that will demonstrate how well your system handled the carb and derived glucose in your meal. I'd recommend recording your readings alongside the foods eaten. I think the point is to understand patterns, and not to go off single readings, which can be really misleading. Any alcohol taken with food will tend to produce "artificially" lower readings, but not the amount of carb eaten, and I generally disregard testing in those circumstances.
I also stay away from anything processed or packaged and anything suggesting "convenience". That started because I didn't trust myself to understand lists of chemical ingredients on things like so-called "keto bars" - those turned out to have around 40g carb in each small bar, not keto at all. So I cook from scratch, with fresh ingredients. That gives me control over what I eat, rather than trusting FoodCorpCo not to lie to me. I batch cook and chill or freeze leftovers, which is what I used to do at the weekends while I was still working.
read around a bit on the forums - and ask as many questions as you like. best of luck.