This article gives some real insight into what makes our media tick especially the left wing media. Here are a couple of excerpts.
Explaining the Facts of Life - "Idea" Conservatives & The Media
The Question of Bias
"So while journalists may self-report as “moderate right” or “moderate left,” actual voting behaviour is tilted to the left, particularly so among members of the state-media outlet. The professed similarity to the public is in part due to an “I’m centrist” claim many journalists hold about themselves which I’ll soon analyze in more detail."
This particular piece from the article reminds me or the prorogation situation and how the media is handling it. They haven't really given the historical facts about prorogation.
Media facts: History is history in journalism
One useful aspect of journalistic culture to understand is that reporting and analysis too often reflects a “today” consensus, one deficient in historical perspective and which might otherwise call into question the approach some reporters take and also how the news is framed. (h/t) Canada's Journal of Ideas
Here's how you can determine media bias.