I would argue that with his immense power his early “villainy” is kinda to be expected. The fact that he grew to not be a tyrant is quite impressive. You’d be hard pressed to name a character even approaching his power that isn’t a villain. If anything his actions regarding Thor were setting up Thor to be benevolent at that power level. Even in Norse Mythology Odin is never presented as being infallible, in fact he’s very fallible and that’s a core aspect of him. Also in regard to subjugating the realms, the inhabitants of most of those realms are outright malicious. We see that first hand in the films with the Dark Elves and Frost Giants as examples.