If you will honestly assess yourself, even the most despicable people you’ve been with particularly at work were able to teach you a thing or two. Or even a lot be it directly or indirectly.
It’s not uncommon however for a bruised and resentment-cladded ego to say that the despicable guy only gave them a harrowing experience not worthy of remembrance and nothing more.
But no I am not one of those who do not see any silver lining out of the agony of being with a fiend wrapped in flesh and blood.
In fact he taught me a priceless life lesson: I now know who I don’t want to become when I get old.