Here's a book you should read. Ben Shapiro takes on (and exposes) the Hollywood establishment in his book Primetime Propaganda: The True Hollywood Story of How the Left Took Over Your TV.
"In this thoroughly researched and detailed history of the television industry, conservative columnist and author Ben Shapiro argues that left-leaning entertainment kingpins in Los Angeles and New York have leveraged—and continue to use—their positions and power to push liberal messages and promote the Democratic Party while actively discriminating against their opponents on the right. According to Shapiro, television isn't just about entertainment—it's an attempt to convince Americans that the social, economic, and foreign policy shaped by leftism is morally righteous."
A lot of grass roots folks talk about bias in the media. Most often they mean news coverage. But it is there in most every bit of "entertainment" that is available.