Haskell has almost no syntax, even `$` is a userland function. Are you arguing against the feature of allowing ad-hoc infix operators in userland?
"almost no syntax" is, I suppose, a matter of opinion. I wouldn't consider these sections from the Haskell 2010 Report to have "almost no syntax."
https://www.haskell.org/onlinereport/haskell2010/haskellch3....
https://www.haskell.org/onlinereport/haskell2010/haskellch4....
https://www.haskell.org/onlinereport/haskell2010/haskellch5....
Dealing with this in Template Haskell is unwieldy at best.
Template Haskell is something to use only when absolutely necessary, while Lispers write macros without a second thought.
I considered your method of writing my own tooling, but have had a vague feeling that Lisp works better for this frame of mind.