Why Do I Keep Replaying Arguments I Already Won?
The brain treats an unfinished feeling exactly like an unfinished task and refuses to close the file. You keep replaying it because of: 1) the Zeigarnik effect, winning the words never closed the loop because the loop was not about words 2) negativity bias, one sharp line from them gets more storage than everything you said combined 3) the illusion of transparency, you go back in because you still are not sure they understood you, and you never will be. You did not want to win. You wanted to be understood, and that is a completely different event.
What it is costing you
You won the words
The feeling never got closed
Your head keeps the loop open
Replaying it changes nothing
Myth vs Reality
Myth
Replaying it helps you find the perfect response
Reality
You already found it. The loop was never about the response.
Ask yourself what they would have to say for this to finally stop.