The insight I will share with you today is that it takes a lot of energy, persistence and time. The needed time is often underestimated. Especially, when starting a business by means of venture capital.
The problem is in many cases inherent in the venture process. The requirements posed by venture capitalists means that applicants needs to be overly optimistic - otherwise you would never be able to start.
It is rare that a new business based on the sale of new products can be build up during less than one year - often it will take several years - even in existing organisations - it just takes time.
Especially two factors take up a lot of time. First the technical development, there will "always" be a myriad of technical problems. The next big hurdle is to get market acceptance - often the acceptance is going to be found with a product that is not all together finished. You may sometimes wonder if it will ever get finished at all.
Some say that you need to sell the product before developing it - they are partly right - only partly.
Frustrating!