I dunno, I think "one of the worst movies" is...yikes. You must not have seen many movies at all.
I thought the first Captain America was alright, though. It's supposed to be really cheesy and I don't think a lot of people realized that; it stuck to the tone of the original comics very closely. I know a lot of people who were upset that it was "too silly" and "not serious" and crap, because apparently everything needs to be dark and gritty now and we can't just have cheesy fun...à la the 1960s Batman show, or even the Tim Burton Batman films. Or, really, the comics.
But yeah, I thought Winter Soldier was a much, much better film, and the Marvel fangirl in me was very satisfied with it, the nods to other Marvel comics and all the little easter eggs sprinkled throughout. The moment when the Winter Soldier punched Cap's shield sent shivers down my spine. Also, I loved what they did with Zola in the supercomputer, because his actual robotic display form would have been really, really stupid to see in live-action...