The mindset you should have (I know it's easy for me to say) is that you made the best decision with the data available at the time. For every success story, t

The mindset you should have (I know it's easy for me to say) is that you made the best decision with the data available at the time. For every success story, there are many more failures, where after years of hard work, the company still doesn't succeed, where the managers that look like idiots are really idiots, and the stock options end up being totally worthless.