I was also criticized in such a way when I was learning to play the guitar. And somehow I managed to motivate myself with all those destructive criticisms until I got to where I am now. And even though I'm not an excellent or very good guitarist, I'm happy because I did it by myself with my effort, perseverance and patience. Although in the same way I would like to continue learning and improving more. I like the idea of helping other people, although sometimes there are people who, no matter how much you have helped them, they end up paying you badly. The best thing to do in such cases is to get them out of our life and go ahead. PS: I really liked this: BETTER DAYS AHEAD