USA and Canada place importance on GA flying.
I have heard BA pilots bitch about cadets. I have also heard some low cost airline captains really bitch about low houred guys sitting in the RHS. Cadet or not. They just don't bitch about it publicly. I have heard my captains bitch about the low hour guys. (Note, some not all).
As they have said, you cannot take your eyes off them for a moment and they can be a bit of a liability when the weather is rubbish.
Note, some not all low houred guys.