And I am sure you do. Whatever you publish will be the best you could do at that given moment. If you later go back to what you wrote and find it lacking in anything, remember that in the mean time you have grown, evolved, and changed as a person, as a human being, or as a conglomeration of all of your parts. Also, nothing needs to be perfect from the start. And nothing needs to be as perfect as that one grand piece you proudly present to everyone.
This is your art. This is you.
If it was static and perfect at all times, it wouldn't be alive.