Critic's math

I recently read a Jon Acuff blog about Critic's math, where someone receiving feedback from others can't help but apply the following formula:
1 insult + 1,000 compliments = 1 insult.
The insult is the thing that sticks and often overrides a multiple of compliments even if you don't want it to.
I was thinking, this can apply to other areas in life, but with some possible variation, and I think it can be built on further. For example, if we are hurt by someone, often that hurt is what the mind dwells upon despite all the good times and kind words. However, I also find that, with time, these hurts are forgotten to varying degrees and it is the good memories that remain. I guess that's the beauty of forgiveness and reconciliation. While we need to forgive, we do also need to learn from these situations, though, and not just let ourselves drift back into them again.
Another example has happened to me when I've been travelling. Sometimes tricky things happen to me when I'm in some foreign country, and there's just no option of going home to the familiar and safe. Whether it's being told my booking wasn't processed properly and so I may be out on the street for the night, or I'm in a strange town where no one speaks English and I need to find some transport but no one can tell me where or when to find any! In these moments I just want to give it all up and go home. In these moments I wonder what I'm doing, why I'm here, and maybe I just want to cry. Looking back on travels, though, these are not the moments that stand out, but it's all the good times that take over my memory.
Is this the same as the critic's math... does the equation or the power of the equation change with time?