I have never been an O'Reilly fan, nor a hater either. When I did use to watch him, he would sometimes seem to have the right perspective on calling people out, both Democrats, and Republicans. Other times he would show his hand as a classic, inside the NYC bubble Progressive, especially with the 2A, and right to legally bear arms, calling AR-15's "weapons of war", etc. Also, I did not like him bullying guests, and talking over people all the time.
Although I know longer get Fox, I do like what I have seen of Tucker Carlson, Greg Gutfeld, and Jesse Waters.
Look at the larger picture, and this is nothing to do whether one likes O'Reilly or not.
What has happened here is the Alt Left Liberal using Media matters has successfully removed someone from broadcasting. It was done with the liberal tried and proven sex smear technique, and assisted with Media Matters contacting advertisers and waging a campaign to get them to stop advertising.
O'Reilly won't be the last. Next up will be Hannity, then Carlson. You can see a few others as well. The Alt Left is empowered now by taking down the most successful cable news show. And to add to this, the Murdoch brothers are both liberal progressives, so the transformation of Fox is underway.
With George Soros backing them and now with a major score, look for it to intensify.