That's exactly why most FP articles and tutorials around the net didn't help me, but Dan Grossman's "programming languages" coursera course did.
If (when) I ever learn enough to talk about why OCaml is better in detail, it will be with concrete examples not buzzword bingo :)
Haskell aims to be a terse language, right? That's one reason that makes it difficult to "read" it and if you can't read it it's hard to learn it.
Think about learning to read and write Chinese when all you know is English. The only way to do it is to have a text-book that shows you sentences in both English and Chinese. I don't think it is necessarily "difficult" to learn Chinese, but you need learning materials targeted to an English-speaker.