It really is about counting carbs and giving the right dose for those carbs. Timing, prebolusing helps too. Some people are better at it than others for whatever reason. But I am wondering, how about a loop pump?? Omnipod 5, newer Tandem or Medtronic pumps make adjustments themselves and make it easier to deal with keeping your numbers in control. It sounds like you would be a perfect candidate for it. It adjusts your basal rate so you aren't as likely to drop too low and it adjusts it higher if you need more. You still have to enter what carbs you eat, but some pumps even do that easier with saying higher or lower carb meal. And it still has to be programmed initially, but your Doctor should be able to help with that.
Why don't you ask your doctor about a loop pump??? I'm not sure what's available where you live, that can vary.