Oh god, yes.

I liked the character in Thor and some people are writing her very well (she's a useful external view), but the Mary Sue aspect is driving me bonkers.

I note it's now gone to the next stage which is "Jane starts bitching about her and everyone starts to hate Jane as a result", so soon we'll see the "the Avengers take over the world and kill everyone who does not bow down and adore Darcy" stage.

I think Loki's tried it already.