This mirrors my experience in SML/NJ, where for the longest time the most common error message the compiler would spit out was 'tycon mismatch' and a Google search would not tell you what a tycon was (it's a type constructor).

I think, unfortunately, I've observed a pattern in much functional programming (F# being a blessed exception) that relatively excellent computer language designers suffer from the utter ineptitude of the human language competency of the tool authors. These days, I am far more interested in an elegant tool chain and support infrastructure than an elegant language.