Most don't object to President Trump using Twitter. People like me object to when he uses it to issue what reasonable people would construe as being childish, personal attacks.
I'm all for President Trump ripping on the media, Hillary Clinton, the FBI, Liberal Judges etc.. it's just that some of the criticism of him he bring on himself and THAT is what most people (self included) wish he'd stop.
See the difference?
No, would you kindly define “childish, personal attack?”