Sounds familiar. I would say most long-term memories I have are of traumatic nature. I have some good ones, sure, but I guess not many. I also remember random unimportant stuff sometimes. I would say I remember extremely little of my childhood and teenage years. 20s I remember a bit better, but much less than, say, my partner.

My father made it into a thing with his whole "how don't you remember?? There's something wrong with you", because his long-term memory is very good. Mine is like my mother's, I'd say. Anyway, once my partner said "how don't you remember??" exasperated when describing a person we both knew, and that alone made me cry, lol. (In that case, it turned out they misremembered the name, so it was a misunderstanding instead of my memory.) It's not like I choose not to remember. I don't mind that much, but when someone nags me about it, it does bother me.