I feel the same way about all ORMs I've seen (minus micro ORMs which I feel are just inferior to F# type providers but work in same spirit) they just try to map two semantically incompatible data models and try to make it look transparent with a bunch of needles complexity - when it ends up failing you're stuck with something that's a hell to debug and tweak.

Contrast that with type providers - they expose SQL to the compiler - this way you get compile time SQL query checking, type checking (it generates types for SQL queries) and it's manipulating data as input and output with known standard SQL semantics.