Donald Trump has not held back his criticisms of private citizen

Middle Township - Donald Trump has not held back his criticisms of private citizens, foreigners, politicians (of both parties), the scientific community, the media, the U.S. judicial system, the U.S. intelligence agencies, the electoral system, and likely other institutions. It is baffling that he is so demure in regards to the Russian hacking and interference in our election. Why is it left to others in his administration to be more direct and critical?