I'm so sorry that it's bad news, and how difficult this makes your situation now. When steroids are also necessary, it makes everything to do with diabetes that much more difficult. It sounds like you and he are doing the best you can balancing the whole situation and that he is well taken in hand at least at his clinic. We talk a lot about control and preventing complications, but that is really a question of probability, not determinism. And in all the discussion of "controlling one's diabetes," the fact that many people can't achieve good control search what they do (or can only achieve good control at the expense of their quality of life) is often completely buried. It's not that we're helpless in the face of it, or that diabetes dooms us to being unwell necessarily, but at the very heart of it, diabetes IS still a disease and it DOES affect our bodies in non-negligible ways. What I'm trying to say is that whatever influence our actions may or may not have on our outcomes, it's always ultimately the disease's fault in the end. Here's hoping for the best possible outcomes for the future for you both, whatever those may end up being from here.