LBJ - all time worst president.
Nixon and Kennedy were better than LBJ, and Reagan was better than all three.
Beyond that, it depends how you define worst. He’s the sort of person who is smart enough to rob banks because that is where the money is, but only if you can get away with it and don’t seem to screw up other people’s lives in the medium term.
He knew enough that when one is stealing milk you don’t shoot or even starve the cow, and that you treat the cow right if you want to keep the milk coming.
After Reagan, I’m confident that Trump and Clinton knew this theoretically, but do not think that Clinton cared.
Carter had more of a conscience, but less of an ability to execute.
DITTO that, LBJ the absolute worst and EVIL to the core!!!
Woodrow Wilson was the worst.