"weird idea that individual aspects of Loki are distinct and individual"
Maybe that's because the destruction of the crown required Kid Loki's death? And Loki, a master of the mystic arts, confessed to Kid Loki's death?
I'm reminded of an old Avengers story in which Zeus created the perfect woman for Hercules, as bait for Hera. She was 100% sentient, even thought Zeus created her out of thin air. And when he ended her, Herc rightfully called his father out for what amounted to an act of murder.
How Kid Loki came about simply shouldn't matter. He has a right to decide his own future, character and destiny. Your arm cannot make decisions for itself. It is a thing. Kid Loki was a person. Kid Loki could his own decisions.
The current Loki stole that from him. That was made clear when Kid Loki died, Young Avengers showed that to be Loki's thoughts on the matter as did his confession to Thor, verified by Verity herself a mystic lie detector.
All you have on your side is your personal interpretation, one that so conveniently absolves Loki. So that he can be your Draco in Leather pants