Some losses can be pointless and there are no lessons to learn. I agree with this. This is why I think I barely learned anything from the loss I incurred. I could have been wiser, but I wasn't. So I cannot gain anything but perhaps someone else can get a better advice because of what I went through.
A relationship failed is a wasted time, I don't always agree with the concept of "I learned"
We mostly package wasted time with the idea that we learned something
Classic defensive thinking.