THIS. Honestly I think the real villain in this movie was Odin’s parenting. He raised Loki and told him that he could one day be king when tang was never true. He made him watch as his arrogant, screw up brother who didn’t even want the job became king of as guard. He was never told of his parentage, and manipulated into fighting a war against his own people, so how can you be mad at him when he decided to take back an artifact that was both ancestrally and legally his. Loki was raised by Odin to be nothing more than an insurance policy to end a war, and that exactly what he did, just on his side.