Welcome to the forum
@kimkim
Sorrybto hear you are struggling with weight gain

And that your meds don’t seem to be managing your BG levels effectively.
Insulin certainly does have a reputation for weight gain in some places, but we have very many long term insulin users (30 years in my case) who have not seen any appreciable weight gain at all. So it can’t *just* be the insulin, it must be something else going on too.
One of insulin’s jobs as a hormone is to enable the storage of excess glucose as fat if the body is taking in more carbohydrate than it needs.
Have you any idea of your approximate daily intake of carbohydrate?
Your elevated BG suggests that you are eating significantly more than your body can handle at the moment.
It may be helpful to keep a food diary for a week, to try to assess your carb intake (be brutally honest! And include all snacks too). Then the following week record BG values before and again 2hrs after eating alongside your carbs, to see if you can spot patterns.
Then begin to adjust portion sizes, and try swaps to see if you can keep the ‘meal rise’ down to 2-3mmol/L or lower. You will find your average BG comes down gradually if you can do that
🙂