There is a lot of stuff on the internet that is basically fat-shaming diabetics for causing their own diabetes with their bad diet and lack of exercise and general lack of moral fibre. A lot of this stuff is written by non-doctors, often with a supplement or diet or training plan to sell that they claim will completely cure diabetes if only people stick to it.
I read this interesting book
https://tr.im/KfVg2 that gave me a lot of useful tips about my disease and also a different perspective on the best therapeutical approach. I think you should read it too.