http://fivethirtyeight.com/features/science-isnt-broken/
This is an interesting article-- it's got an overview of what's currently seen as the problems with replicability and fraud, and some material I haven't seen before about handing the same question to a bunch of scientists, and looking at how they come up with their divergent answers.
However, while I think it's fair to say that science is really hard, the article gets into claiming that scientists aren't especially awful people (probably true), but doesnn't address the hard question of "Given that there's a lot of inaccurate science, how much should we trust specific scientific claims?"
You're right, though I'm not sure what the best way to phrase it better is.
My question still stands, since the parts of science which are most fucked seems to be the parts that have the most immediate impact on people's choices.
What do you mean by immediate impact on choices? Very few people make choices based on what the psychological theory of the day says they must do.
The most impactful branches are probably medicine and economics. They are medium-fucked, I think, because at the psych/anthro levels of dysfunction your patients just die or your economy implodes and people tend to dislike such things :-/