Individualism goes a long way in taking the pressure off.
Young guy drives past you with a pimped-up BMW and you compare. Where did you go wrong? Where did you take the wrong turn and that guy over there took the right one?
Who is the competition? Anyone does seemingly better than you.
Doubting yourself when someone came to a different conclusion to the same issue that was posed to you. That person is smart, therefore they made the right choice, which happens to be the opposite of the one you made. So, it can only mean that the decision you made is the wrong one. That can be the only explanation consistent with what you think you know about yourself and what you think you know about the other.
Maybe both decisions make sense. Right for him, most likely the wrong for you. Your pace is meant to be different from your neighbour. It doesn’t have to be all wrong or all right, not everything has to add up all the time. Not always is there a clear distinction between one and the other– sometimes the meaning of a decision means nothing in abstract and its value is completely hinged on you and you only.
After the fact
It is how you opt to act after the fact that then molds the meaning of the decision. Only then does it add value and reflect a truth. Until the consequences pan out, however, you are only left guessing. Maybe stop guessing, maybe you made the right choice, maybe the wrong one but you made it now so just work on the right here right now.