My Grade: A
... Thor is a being who lives on another plane of existence and... well, honestly, I'm not sure what any of that was about. But he's heir to a throne of his plane, he pisses of aliens his people are in a cold-war with and winds up banished to Earth, sans his powers until he learns some humility. His brother, back home, is trying to help the plane's enemies make a run for things, somehow Earth is, sort-of, in the cross fire and... bah.
Honestly it's a mess and half the time I wasn't sure what was being said, what was at stake or why I should care, the care is lessened by Earth not being the focus of what is in danger and the most we see of it is is a nowhere town in Arizona...
You think half of the movie was "a mess" and yet that's still an 'A' from you?
I was confused by the high grades in the poll, but if you can think nearly half the movie is a mess and still give in an 'A'...well I guess that may explain the results I'm seeing.