I cant speak for everyone on their feelings on Thor's portrayal but I dont like the way Whedon treats Thor.
I dont want him to be like his comic counterpart , because that would look ridiculous on screen.
But for example: The Destroyer by all accounts is/should be >>>>>>>>>>>>>> Ultron. Thor disposes of the Destroyer in Thor 1 with no problem.
Then after Thor 1, he is greatly depowered in all his next appearances in the MCU.
I understand he has to be toned down so the other Avengers don't seem useless but they go a bit overboard with this.
Maybe he feels that if he goes all out he would cause too much destruction around him? I dunno , he did fight the destroyer in an empty desert, and those frost giants in their home world that Thor could give two shits about.