75% TIR is absolutely brilliant, so please do cut yourself some slack!
Are you still eating low carb or are you eating more normally now? I would encourage you to do the latter and start learning to use your Trurapi for all meals, even if you just need very small doses. Getting into a routine with injecting and eating gradually just becomes second nature, so if you start eating more carbs and needing insulin with your other meals, don't shy away from it, as that is what managing diabetes is all about. Matching your insulin to what you eat, not restricting your food to avoid the insulin.