Why do some pepole consider the way the meida cover candidates for public office bad for democracy?

Because currently Majority of News Outlets are controlled by democrats and since there are more news stations near the left, biased opinions have occured against the republican party. With this people are getting scared that the news is kind of becoming communist the way Majority news outlets report the same thing, and people see the need for more diversity among news outlets. Though it is pretty over exagerated that people think news is becoming communist