CSS does feel a lot more complex than it ought to be, but it's dominated in every variable of badness by XSLT. That's the one language that defeated my efforts to learn it (mainly by killing all desire to do so).
haha. I actually love XSLT. It's closer to a language like Haskell than it is to any common language, which is probably part of the difficulty people might have in learning it. It also uses structural pattern matching, which doesn't exist in any common language at all. That's unfortunate considering pattern matching is almost as powerful a feature as first-class functions are.