Sun TV and Quebecor would argue that it's unfair that CBC gets the public funding and that they have to compete with them, so they go out of their way to do whatever they can to discredit CBC.
It's journalistic only in the sense that they're looking for information to use against the CBC in a journalistic fashion. It's not about CBC's journalism. I don't think they care about CBC's journalism. They might care that they might think they're left of centre, which, by the way, I have never believed. They might think they're unfair to the government, but that's not what they're going after. You wouldn't find that out from freedom of information anyway.