I, too, am glad you found our forum, and I'm glad you decided to confide in us - however suspicious you were of a support forum where people actually take an interest in getting acquainted and helping one another.
There is a wealth of knowledge & wisdom here, from the people who have had success with the management methods discussed here. Our experiences are personal hands-on - not the stuff you get from a medical school textbook.
You have already discovered that diabetes is no respecter of persons. We
didn't do this to ourselves - it is not our fault - no matter how horrible our eating or exercise habits.
You may have also discovered that extreme exercise doesn't turn things around quite as quickly as you wish. That is par for the course, because the biggest factor in our high blood sugars is what we put in our mouths. Exercise is a wonderful thing and it does help some, but it's all the carbs you eat that is wrecking your blood sugar.
You'll want to have a good long look at
BloodSugar101, and after a couple hours of study here, you'll know more than your doctor about treating your diabetes. After that, you should consider a low-carb/high-fat way-of-eating -
LCHF for Beginners. And if you have trouble accepting that athletes can be competitive without carbs, then google for
athletes in ketosis and see what's new in this milieu.
Peter Attia might be a good place to start, since he's not only an endurance athlete, but a
medical doctor/surgeon.
The learning curve for diabetes can be pretty steep sometimes, but once your own testing proves to you that you're on the right track, you may start feeling better than you've felt in years, way before replacement hips and arthritic knees!
Another good practice to develop is
eating to your meter.