Earlier quoted context omitted.
The complaint is that it was designed for lesser brains and lacks many features professionals expect, and that's pretty much an objective truth.
This is a horrifically obtuse and offensive comment just because Go isn't Lisp-y or Haskell-y enough for you. Golang powers large swathes of distributed services and systems all over the world whether you like it or not, because it was designed with a very specific purpose in mind by people far more professional and accomplished than you ever will be.
“The key point here is our programmers are Googlers, they’re not researchers. They’re typically, fairly young, fresh out of school, probably learned Java, maybe learned C or C++, probably learned Python. They’re not capable of understanding a brilliant language but we want to use them to build good software. So, the language that we give them has to be easy for them to understand and easy to adopt.”
-- Rob Pike