it's an interesting thing, and I've been thinking about it.
At the beginning of Ragnorok Thor shows up and sees Loki's play, which is obviously false, distorted, manipulative. Pick one, or all. And everything he says to Thor are blatant excuses and lies. Did Loki actually "enchant" Odin to abdicate the throne to him? I'd be surprised if anyone truly believed that watching the film.
Odin was dyeing and was in a place (Earth, Scandinavia) that he felt at home. Thor and Loki had a deep, sincere conversation with their father just before he died. I had no impression watching this that Odin was in any way enchanted or doing anything he hadn't intended.
Maybe some interpreted this scene as though Loki had manipulated or enchanted Odin Into choosing to die so that Loki could take over Asgard.. I just don't see it that way..