Haskell is the worst. If you make something in Haskell you hate your end users.
That being said I do a bunch in Haskell!
Whenever I install the Haskell package "aura", I need to be careful tot get "aura-bin". The install-from-source version will install a crazy number of Haskell packages.
That said, not a problem with Haskell per se. I'm very happy with aura-bin.
Arch Linux wants to provide an _up-to-date_ compatible set of Haskell packages, instead of relying on the established Stackage like what NixOS does. This certainly causes frustrations as they must do a lot of patches.
End users don't benefit from this decision; they complain about a large number of tiny packages. Haskell devs don't benefit either, as they don't use packages provided by the OS -- just like any other Python/Node/Java/etc dev. Rust programmers use rustup+cargo, Python programmers use pip; likewise Haskell programmers use ghcup+cabal.
That being said, I respect their efforts and the packagers (Felix Yan, et al.). They made great efforts in updating a large number of old packages to be compatible with GHC 9.x.