Because thats basically what the program is. I really wanted to like it: I like Whedon and Marvel: it seems like my dream show. But the dialogue has unfunny one-liners shoehorned in every possible moment at the expense of character, the actors are beautiful at the expense of ability, and the antagonists are shitty offcuts from the movies at the expense of drawing from the rich history of the comics.
I really wish they had brought back Hydra as antagonists for the show but I am guessing they are saving them for the movies. They could also use HAMMER, Ultimatum, AIM or the Hand as well. If this show lasts more than one season or a few episodes hopefully things can improve.