I've had an epiphany, maybe people mostly tend to remember and recount the negative traits of a person that they lost or moved on from not as an act of malice but rather self-preservation. Maybe remembering and acknowledging that someone was "really not so great" or "not as good as I thought" dampens the pain that would have increased manifold if we accepted that we lost someone uniquely dear to us and had good traits that outweighed the bad.
Probably I am being too optimistic, but you never know how most hearts cope in this transient world. ❣️🖤