Perhaps if you think about the thousands of years our pancreas glands have developed over to give us humans such a well controlled blood sugar handling system and out of the blue you find yourself having to take over the autopilot and keep flying as level as possible - it is a big ask to be able to keep things under control 24/7.
Each less than perfect day is not a failure, it is a learning experience - one I admit that is not easy to always feel grateful for!! Even an ace pilot has an off day, every spider building a web has the chance of a 'building malfunction', every brilliant musician can have a miscue or play a wrong note. (I think David Bowie even made it an art form).
Humour, including self humour, is one of your friends in this challenge. You know it has only been 3 times in 51 years that I have hit a blood vessel when injecting insulin. What a lousy average !! And one of my friends always asks that with so many injections and finger pricks, why do I not leak with a sieve after drinking water. And I am sure that high BSL was because of the weather and that hypo was because that walking trial just had to be steeper this time round than last time. We live and learn.
And old fogey called Voltaire has a saying: Life is a shipwreck but at least we can sing in the life boats !
(There is a friendly shore somewhere )!