There are two different workings at work here. Wanting feedback on a technical skill set, even performing, is pretty normal, although the really free person might be able to reside comfortably in the certainty they did their best.....but technical skills grow on continuous feedback and review and creation don't happen simultanously. That's why it is called REview.

But the far deeper issue is the creation of the belief of inherent unworthiness ... the notion that "I" am not (good enough worthy, smart enough, acceptable, etc.)

To buy into this terrible habit, which many people do, you have to first set up a "self" object which you then look at (in order to criticize it). Or else, you have to set up a "critic" viewpoint to go and be while deprecating "yourself" -- a mental image of a critical parent or a generalized "what people think" machine to sit in and shoot at yourself from. However you implement it, the basic is departing from being yourself in order to set up a two-pole critic/victim of criticism relationship. Andit is always a waste of time, done this way. Unless Mom (or whoever gave you this lesson way back when) is right there in town with you, it isn't a real present event; it's a piece of luggage being used to beat yourself on the head with. The beater or the beatee or both are false identities.

And sometimes it helps to notice that all the power of the "critic" end, AND all the power of the "victim" end, is coming from the real you that never goes away, but can be disguised or screened off. Finding out who you are can do wonders for your self-esteem. It's the false identities that cause suffering.