My main problem with Cap II is that there just seemed to be way too many Hydra agents. I get that they infiltrated some key positions, had a few teams of bad guys, etc, but it looked like they had a huge number of evil people who were content to just sit there and spend a few decades as sleeper agents until they got activated early by Fury figuring out something was wrong. It got worse in the SHIELD TV show (despite it being one of the most awesome hour's of television that I've seen in a long time) when Hydra took over like every single SHIELD base in the world. It's overdoing the infiltration plotline just a little bit.
The Hail Hydra meme that's going around the internet with all the pics is pretty funny, though.