Why this constant feeling of unsatisfaction?

I never feel like i do anything well enough. I read (still not fully done) a book that basically says you shouldnt settle for people saying you did a great job, you should always challenge yourself to do great things in God's eyes. But now its like i never ever feel like i did good. People constantly compliment me about various things i do in life such as piano, making music and some other stuff and in the back of my mind all i think is "that was lame you need to do better". Its like i push too hard to the point of giving up. Almost making the opposite of progress. Idk what to do in life i feel like theres nothing im good enough at to make a living off of in the future however i want it to be music.