How the first Thor movie should have ended

He picked it up in Age of Ultron, too. Thor's hammer doesn't answer to needs or situations, but to worthy people.

its explained in the comics pretty close case. Captain america is only worthy of the hammer when he's in the middle of battle because he's too mild mannered otherwise. he only has the qualities that the hammer wants when he's full of adrenaline and battle focus.

I'm not sure that carries over into MCU

So only when his Di*k is hard for battle