Why is it that you sometimes look back and would wish that you took a different decision? It doesn’t make any sense at all to me but I keep doing it. But really, at one time in your life you made a decision. This might not be the decision that you would or might have made with the knowledge you have now but you made it. Don’t regret. Don’t look back and dwell on past decisions, they created the path where you ended up right now. If you don’t like where you are, make different decisions.
Your past decision and choices were taken at a particular point, moment, place in your life and you probably felt that that decision was the right one. Afterwards your conclusion might be different but at that particular moment you thought you made the right one. So there is no problem to look back, you will learn, but do not regret, it will not take you anywhere.