I know what you mean. I have many regrets, because of some decisions I made years ago, for example when I chose my study field at university 7 years ago. Today it feels like I made the wrong decision back then as I am now very unhappy where I'm at, typically now at the culmination of all the studying. But, it's so hard to change now, and to be quite honest, I've lost total sight of any possible alternatives, as I now don't feel passion and/or love for anything anymore .