hello @Kwebster93 welcome to T1N. I am sorry to hear about your control problems but I have to tell you that after ~35ish years of T1 my sugars can run all over the place. Do you pump? are your troubles highs or lows I am guessing both?
Things to check: if you are pumping, there can be many issues around infusion sets and sites. crazy blood sugars (strange high sugars) can be a result of infusion sets and sites that are scarred, bent, occluded, irritated, etc. I hope you are carb counting - as a general way to calculate how much insulin you’ll need for a meal.
testing is also really important, for me not just before meals but at about 2 hours after, because if I made a mistake there’s a way to see the difference at 2 hours can tell a lot about if you have enough insulin to cover a meal or if “something happened”
I use a pump so I can program basal rates. this keeps me closer to the best basal rates for me. still, when the seasons change i need to skip meals and see if my fasting blood sugar is rising or falling. I generally call this a “tune up”. I also use a CGM for this purpose. ONe thing I learned is that if I go low/no carb and medium fats and proteins, my blood sugar is very flat. I was able to keep my blood sugar at about 75mg/dl for 2 days no spikes even after meals. If you are comfortable with tweaking and changing your own insulin, then I have seen that diet and exercise changes make the most impact on blood sugar control (in my opinion). The best reference manual is “Think like a Pancreas” book which you can buy on Amazon.
if you are not comfortable making your own changes to insulin or diet, or if you use MDI, or if you are unhappy with your control in general the best thing is to get with an endo or CDE and go over your lifestyle and see what things you can do to improve. Even after 7+ years, there is always new things to learn and other ways to look at it.