The important thing is that you feel satisfied with what you do or achieve. In my family there is a lot of pressure to be “successful” but after a while I decided that I have to be happy with whatever things I can achieve, and believe me, after that change in my mindset, good things began to happen with apparently no efforts. So as other ones are saying, believe en yourself, don’t be so harsh on your past or decisions, and remember that there is no race or goals you need to get, you create your own life.