Something about Haskell strikes me as different. Despite the buzz about it, I don't see many projects for it other than shellcheck, pandoc and xmonad, and for two of those, there's better solutions around (sphinx, awesome/i3).
The other thing is the general flow I've see with Haskell programmers, many really tie down their identity do it. They see programming as a crossword puzzle for them to solve in short term, not as something other programmers have to read later on. They're not very empathetic to the idea the runways dwindling and you have to ship sooner rather than later.
In addition, I found that the Scala / Haskell developers I knew took golang to be quite the nuisance. They find gophers pesky. I think the reason why is years of Haskell teaches them to overengineer and complicate things needlessly. It's frustrating because they're not aware of it themselves and take offense, even blame you when you point it out to them.
Maybe I've just been unlucky. In 10 years, I've never had people who consistently failed to ship, been mean and arrogant as scala / haskell programmers. They take the slight criticism as an assault on their identity.