Having known journalists, I think it's better to apply Hanlon's razor. Most articles are likely to be being written from some office in London by people who have no direct experience with the issue in question, and the primary metrics they'll be optimising for will be page views.

For example, a writer for the Express won't write an article about how the British Empire screwed India because it will annoy the readership. It's not propaganda, it's people who don't know what they're talking about desperately fighting over shrinking advertising revenue.