I can identify with you my friend, we had same experience but that doesn't make me depressed for a long time, for me to be succesful is you have to face the reality of failures. It is hard yes specially when you work so hard and it turns to nothing. Keep the ball rolling, keep the faith... research and study bounties white paper but i believe that even how beautiful the white paper is, if it will not reached soft cap and hardcap it will be nothing. better to not to expect so much from it.