Earlier quoted context omitted.
Haskell is interesting, it is probably one of the best programming languages ever devised but it just can't seem to gain traction. There are some isolated pockets where it does well (both business wise as well as geographically).
I like Haskell, but I never want to work with Haskellers, ever again. I’ll do personal / solo Haskell projects. But never professionally on a team. Haskellers are not team players. Rustaceans should really take Haskell as a cautionary tale. It doesn’t matter how good your tech is, if your community is actively hostile to newcomers, if you try to haze every newcomer by making them recite your favorite monad definition…
That said, if toxic behavior occurs it can be more visible in smaller communities, just by how the numbers work out, so I don't doubt you've had a hard time interacting with some Haskellers, and I sympathize with you. Please point me to any toxic behavior you see in the public Haskell community and I'll do my best to address it with whatever authority I have.