Why do the Denver Broncos want to get rid of Jay Cutler?

They don't want to get rid of Cutler. McDaniels was a coach at New England last season when Cel took over for the injured Brady. He was attempting to get Cel who already knows McDaniels system and knows what is being asked of him.... He figured life as a head coach would be alot easyier if he had a leader that knew the system well already.. He indeed couldn't get Cel. So there for they do not want to get rid of Jay Cutler. They just didn't want to have to retrain the quarterback to there likings but however if they couldn't get the guy that knew it... Whose better to run it and teach it then Jay Cutler. He's young athletic and can flat throw the football...Also could be a great et to McDaniel's Offense....