Originally Posted by itchyscratch
I didn't get that impression at all. Far from it. I saw him just rethinking his approach. He was brought down to find Loki and take him back to Asgard, but after seeing Loki killing Coulson Thor now knows he definitely has to stay and join the Avengers and do whatever is necessary to stop Loki. It's not a worthiness issue at all. The stakes have risen and in that moment in the field Thor realises that he has to hang around and join the fight against his brother.
IMO i think he was like - i have all this godly powers and cannot even protect a friend