If you want to improve you can't just trust your own feeling. It's better to ask feedback from others. They might see things differently from the outside point of view.
It feels uneasy to show something unfinished to others. But some things are easier to fix before you put too much effort into them. Getting validation that you are on a right track early can save you a lot of work.
You can also become blind for the small things when you are too close. Or you might focus too much on the details so that you miss the big picture.
When you think you are done you might still have a doubt that it's not ready. You just keep trying to make it better fearing to show it to the world.
But if you can show it to somebody you can at least get a verification that it's good. In best case they spot your mistakes. That's why you asked for their feedback.
As much as it is aboit making things perfect asking feedback can also be your first step towards bigger audience. It's much easier to tell the world when you have already shown it to somebody.