No one has devalued the office of the presidency, mocked the Patriotism of veterans, demeaned the United States intelligence community, dismantled the effectiveness of the free press, infantilized the checks and balances of Congress, caused greater division among citizens, spread more disinformation, encited as much hate and fear and racism, lowered general discourse as low, trampled as much over the US constitution, distanced the US so far from Western allies, and generally made the United States of America so...small...in the eyes of the world than Donald Trump.
No one on that list has done so much (in 3 years no less)...it's not even close. I really don't think it will ever get back to where it was, that's how much damage has been done and how much discourse and the way we view things have eroded.
This is worst so far.