The advice is almost always well-meaning, but it’s completely clueless.
“Come on,” the advice goes. “That happened a long time ago. He didn’t really mean to hurt you. They did the best they could. You just need to let it go. It’s time to get over it.”
I know what it feels like to think this about someone, because I’ve done it, too. I remember a conversation I had years ago in which a friend and I mocked someone who couldn’t “get over it” and move on after childhood abuse. That was before I understood my own childhood trauma, so I eventually felt guilty about having said such things about someone else.
But I get it. When you watch someone else go through the agony of long-term pain and anger from emotional abuse, it’s baffling if you don’t have a frame of reference. The person who’s suffered abuse can come across as crazy — at least it can look that way to someone who’s not hurting.

Very few things warm my heart and fill me with joy like babies
It’s hard to nurture what’s alive when you water dead flowers
Freedom matters more than safety, even if you can’t see that
Is it just coincidence that my surgeries come when I’m alone?
Most of nature follows instinct, but humans often ignore voice
Even when folks praise my work, my secret fear is I may be a fraud
My heart longs for a future that’s more real to me than the dim past
What did you want in childhood? Did you abandon those dreams?
I’m all broken up about ‘draconian’ cuts hitting the federal government