The biggest threat to your startup might not be competition or the market. It might be you. This was a painful lesson I learned after my first startup's roller coaster journey.Founders focus on product, market, and code. But there's an overlooked factor that can make or break a company, the founders's own psychology. And I want to help you avoid learning this the hard way.We rarely talk about how what's inside the founder can sabotage or supercharge a startup. Everyone obsesses over strategy and product but ...