I had brief glimpses of emotional catharsis while writing. I remember reading something Philip Roth wrote about how he writes every single day, but it's almost as if he has amnesia every morning - he has almost zero confidence that anything will come but he just sits down and plugs away. And at the end of the day it feels like a miracle: "How did I do that?" I had a similar experience where it was just about putting in the hours and being present.
The reality is sometimes markets don't exist for very good reasons. It might be that there isn't a deep customer need. Or the economic model is just hard to pull off. Or maybe there is a regulatory barrier.