Haskell has a decent web ecosystem at this point. However, if you really want to avoid boilerplate when writing a CRUD app, your best choice is one of the big,

Haskell has a decent web ecosystem at this point. However, if you really want to avoid boilerplate when writing a CRUD app, your best choice is one of the big, boring popular web frameworks (Ruby on Rails, Django, etc.) 90% of boilerplate avoidance has less to do with fancy language features than it does with someone else already having done the work for you. (And dynamic languages like Ruby and Python do allow all kinds of fancy abstractions anyway - just without the security of compile time typing.)