Great insight and very helpful to all future developers of business ventures. One has to realise that there is a lot of no´s in start up journey. As long as you are work on solid idea which you are testing in the market and understand how it is desired by future customers you can continue to push forward, even though others may no have the detailed insight which you have.

I was once told by a large investment banker;

entrepreneurs are the risk takers on ideas which banks do not understand, otherwise they themselves would have invested in them in the first place

it is therefore very easy to forget the hard work required once companies are successful. We ourselves have been involved in numerous unsuccessful companies which are compensated now again by one very special project which comes to light. For us each project created with passion and values means the learning experience is huge.