Yes, this is the answer: the feeling that you're not good enough comes from individualism: focusing on yourself. If instead you find a community and act altrui

Yes, this is the answer: the feeling that you're not good enough comes from individualism: focusing on yourself. If instead you find a community and act altruistically for its greater good, you'll find ways to help and feel achievement that way. Another comment also said that with parenthood these feelings fade, because the needs of the family emerge.