This pose is telling in itself. Has no one ever wondered why, in Loki’s first appearance in The Avengers, he was kneeling? It wasn’t made to look ‘cool’, this is not the typical ‘power stance’ of most villains. It is subservient, and used to show deference to a higher power.
From the very beginning, Loki was already showing that he was not in control.
Headcanon accepted.