Determining the worst things is extremely diffcult  

But let's not forget about these!  These are some of mine!

He canceled Operation Legend, now we have a record crime wave in cities.

He weaponized the FBI to intimidate parents who show up at school board meetings.

His war on fossil fuels has pushed production down and inflation though the roof.

He showed weakness in the face. Of Russian aggression.  Now we are close to a world war.

He has no respect for US law or the Supreme Court, he has violated both with his boarder policies.

He does not respect free speech, by his starting of the Department of Misinformation.

NOT A easy list to make, there are so many!  It would be much easier to make a list of things he has done good.

NOT ONE THING!