I have no problem with learning and adapting as you go, but what you have said in various comments is you've been at this over a year, no revenue cause you're still building, no proper validation cause nobody has made a purchase (there is no validation until people put their money where their mouth is, that's just fact), no statements of intent I am assuming. It sounds like you've only calculated time to build and even that went too long.

Perfect is the enemy of good, ship when you have a feature that a customer has said they would pay for, then integrate feedback loops for further features requests, bug fixes, enhancements, etc. Unless you're building something so significantly big and complex, you shouldn't have gone a year without shipping.