I couldn't find an article about criticism in the wiki. Is there some other place that contains well-constructed criticism for Bitcoin?
This Quora question is a start.
This is a great source: http://critiquesoflibertarianism.blogspot.co.il/2011/05/simple-critique-of-bitcoin.html
It is a short article but you can learn a lot from the comments
See "Decentralised Currencies Are Probably Impossible (But Let’s At Least Make Them Efficient)" by Ben Laurie. He shows how Bitcoin's so-called "decentralization" is such a joke, because it doesn't really work. If Bitcoin's decentralization doesn't work, it makes no sense to waste so many resources over proof-of-work transaction processing. He also proposes an alternative design in a follow-up post.