If Ronaldo can destroy the atmosphere by just being negative, we would have sold him this season right after the transfer window was opened. I am pretty sure ETH would have justified that decision further since such negative characteristics are obvious. Ronaldo will behave professionally if he stays and ETH will also not allow him to override the team. People also said Ole would not be able to drop Ronaldo if Ronaldo comes but he has dropped and substituted him in some of the games.
Its just media flak creating the "Ronaldo Mafia" image. When it became obvious that Ronaldo was not disturbing the team, they started to attack Ole until his sacking. Then they went back to Ronaldo when Rangnick faced difficult results. When Ronaldo started to score goals to shut them up, they started the 1000th dressing room crisis story. Its just how the media works.