Think of each of your Mitzvos as one of your photographs. In retrospect you could have perhaps used a different lense or angle, so you learn for the next shot. And some photos are just about perfect, but being you, you just can’t admit it… And yet others are perfection in itself, so that even you can’t deny it.
The problem/difference is that your photos/Mitzvos haven’t been fully developed yet, so you stumble in the dark as to its merits. You wonder if the the film you used wasn’t expired merchandise relabeled, or perhaps exposed to extreme temperatures which damaged it. You wonder if your subject didn’t move at the wrong moment, if the lighting was adequate or too bright etc. Only Hashem has the Power to develop them and reveal its beauty. (Yeah, it’s an old school moshol but I’m sure Wolf can relate.)
But as I touched on earlier we must “serve Hashem with Simcha”. Sadness is a tool of the Yetzer Hora to depress our potential and limit our Spiritual achievements. So (say cheese), smile, and keep on doing what’s right.