Enjoyed the read. You make a lot of great points and I generally agree with you. I'd say that self-criticism is good when it's positive though, as sometimes we have to be our own parents and say "No!"
It's human to make mistakes and do silly things and I think it's good to admit that to ourselves, as a motivator to become better, rather than beating ourselves up over it. Confidence is a great thing to have but it's much better when it's aimed in a good, constructive direction. Keep up the awesome work :)