At this point I think the hate from journalists toward social media and tech more broadly is better described as "cultural" than literal economic self-interest. If you're a journalist, most of your colleagues believe everything they read in the news and therefore sincerely think FB is somewhere between "at least as evil as its size alone would predict given the typical progressive perception of large companies" and "just cartoonishly evil", so unless you're unusually indepedent-minded that's probably what you'll believe too.