There was plenty of skepticism over Arnold going in. I remember it well. He was pretty much what conservatives warned about: better than Gray Davis, but not as good as it could have been. (Then again, it's California, and given who lives in that state now it'd be tough to get anyone much further right than Arnold elected; this isn't the same state that elected Reagan anymore.)
I don't recall anyone ever speaking of Arnold as the emblem of American conservatism. There are plenty who have preached Trump's superiority.