I feel like a really shitty person because of the way I manage my diabetes

I've been a T1D for about 6 years now and just recently I've been trying really hard to eat better after years of just eating like shit. My recent A1C was 8.6 and I'm using over 130 units of insulin a day still and I feel like I'm a huge asshole who can't control any of my basic instincts when it comes to food.

I want to know if what on average other people use and if anyone else has felt this.