Part of being an artist is always feeling incomplete. If you were content, you have no need to create. You would not have a lack, a hole, a vacuum, an emptiness. Artists create to fill that blank space. They must.
But the problem is that they never feel complete. They make the painting, the poem, the play, the piano sonata – and it isn’t enough. They still don’t feel done. The piece may be good enough for now, but it is never what they saw in their heads. So they have to try to fix it, or make another one, or move onto another project.
It is like living in a world where you can hear another language in your head, but you can’t ever fully speak it. Just trying to say the words is like speaking with your mouth full of water. Yet you keep trying, because to not try means to not communicate at all.
The language you were given as a child, be it English, Russian, Somali, Korean, is a pale second to your first language, which is being creative. Then, because nobody teaches you how to speak that language, you are constantly frustrated in trying to express yourself.
Yet the more you try, the better you get. Try learning different techniques from other artists, either in person or in a book. Get different art supplies. Learn a different thing entirely. If you paint, write a poem. If you write plays, learn to play the guitar. Art is art is art and it all feeds into the well you draw on to find your “words”.
Make something every day, even if it is a small something. Be okay with not being perfect. The only failure is to not try at all. Instead of getting frustrated at that not-enough feeling, learn to embrace it as why you create. Without it, you’d be a robot.