Hindsight, as they say, is 20 / 20 & one can always look back on interactions they've had with others & perceive different ways the situation might have been approached or gain new insights as to what was possibly going on. What's done is done. I would suggest trying to leave it in the past. Consider it a learning experience & let it go.

The alternative, if you find you cannot let it go, is to process it with your therapist if you see one (or get one if you don't.) Some, if not many, therapists have their own therapists they see because they also run into these sorts of problems periodically. And they also need someone to talk things through with.