President Trump vs The Press -- an intentional conflict?

I watched the first few minutes of President Trump's latest press conference. Starting out and emphasizing his disagreements with news media, at least the mainstream news media, struck me as significant. President Trump has spent 45 years in business. In that time he has been largely successful and must obviously know how to work with people. Constantly antagonizing the news media is not the way to get more favorable coverage. Rather, his constant complaints about the media will, if anything, convince the media to find more ways to attack him. So the question arises -- is the Trump vs mainstream media conflict something President Trump is creating and encouraging? Could he want the media against him?