I’m not arguing about the existence of bias or the numbers of L/R leaning media.
There’s simply more left leaning Americans vs the stance of the Republican Party who’s specifically engineered their message to appeal to voters with more political power. Ex: Losing the popular vote when winning the presidential election only happens to Republicans.
However, simply counting the number of companies leaning left or right doesn’t tell you much. A local newspaper with 5k readers just doesn’t move the needle. Neither does an outlet that’s 0.1% left or right leaning.
So the only accurate measurement is level of lean * number of viewers, and when you do that calculation (as I have) you find the overall media landscape leans Republican.