We've all got excuses. I was a 135lb drug addict in 2006. I'm bench pressing over 300 at a 175-180 bodyweight today, same body fat % as I was at 135.
I'm not referring to your diabetes with that, just about excuses in general. They don't have to hold you back.
Beyond that, attaining the physique you want just takes time and dedication, year in and year out. If you keep showing up in the gym, and keep eating right and managing your diabetes well, you'll keep improving. Success builds on success, and you've already had some. You moved up 2 points on the physique scale in 1 year. If you move up 2 more by next year, and 2 more after that, you'll be a 7, which is significantly better than what most people ever dream of reaching. Soooo..... keep up the good work! can't wait to see progress in a year.