I'm sorry you feel like that, we all get fed up with it sometimes, you're not alone.
From your post you know what to do though, cut out the junk, test, test, test, you have to get yourself into a routine with it and it becomes a lot easier.
I spent around 8 years doing the minimum but after getting some bad pains in my feet 2 years ago I started to do alot of research on what would help me, I got my HBA1C down form the 8s to the 6s in only 6 months and it was so inspiring.
Have you spoken to your diabetes team about how you are feeling? They will be able to help you put a plan together to start making positive changes. The onus is on you though, with the support of the lovely people on this forum you CAN get control back and you will feel so much better for it, I promise