Some disappointment fades after you stop retelling the moment as a judgment of your whole life.

An event is one size; the story built on it can be any size at all. A rejection, a bad review, a day that went badly gets retold internally not as something that happened but as confirmation of a permanent quality in you. The retelling is what keeps it warm, because each pass adds another piece of evidence to the case.

Notice the next time the memory arrives and what it is being asked to prove. Try describing it once as plainly as you would describe a delayed train. You are not denying it happened; you are declining to let it summarize you.