Unless your narcissistic tendencies are extremely well-developed, all creative types will spend a greater or lesser amount of time wondering if what they’re producing is actually any good. With writers, there’s the tendency to compare your work to that of your favourite authors and come to the conclusion there’s no point even bothering.
I came across this quote yesterday that offers some encouragement.
“Use what talents you possess; the woods would be very silent if no birds sang there except those that sang best.”
Henry van Dyke