Even he considered his work to be worthless, and his life a complete failure. Today his paintings are priceless. Fact is, what we think about our own creation does not matter. Your opinion of my work of Art is vital to me. Your approval validates my work.
Some creative people are very persistent.
They do not seem to need an audience. They need validation too. They just hide the need of it behind their stubborn Independence. No one likes their art. They are social outcasts.