I'm 27 and was diagnosed in June. I find it a struggle to control my diabetes too, I think it's important to remember that we're trying to replicate what our bodies should do automatically and unconsciously via MDI. It'll never be perfect, all we can do is try our best. The main thing is not to give up on trying to control our BGL's, that is when things can rapidly become dangerous.
Have you had much communication with your diabetes team over your control? From what I gather, ever know and again people experience changes in their insulin sensitivity and this will change how much they need to take with meals and long-lasting insulin. How you tried doing a bit of a reset to make sure the ratios you're using are still right for you?