Henrique, your very honest list of all stuff you probably didn’t right is exhaustive and would be good if you add a list of stuff you did well!
Once, way back in my live, I’ve reached the same point as you described today. Looking back with many years distance I forgot how many mistakes were made, I forgot the details of failure, there is only one reason you fail as a startup, losing the passion. The rest is irrelevant.
Now put on your positive and passionate hat and add listing of your achievements so everybody can learn these as well. You created something very beautiful, be proud and tell us why do you believe in Goosit!