As a Scala practitioner (well, in my previous job) I found Scala code harder to understand and read than Haskell.

Haskell's syntax is actually quite minimal by comparison. Scala type signatures, in particular of library functions, can be a beast to understand.

Also, because many Scala devs start using it as a sort of "better Java", spaghetti code and imperative-style messes are relatively common. This doesn't happen with Haskell, because nobody starting Haskell tries to write Java-like code with it.

That said, I do like Scala better than Java!