Nothing Trump has done yet has quite the same consequences as:
Expelling thousands upon thousands of Native Americans from their land in direct violation of a Supreme Court ruling, condemning many of them to their deaths on the walk to Oklahoma. (Thank you, President Jackson!)
Launching an insane landgrab war to try to steal a third of Mexico under false pretenses and false accusations of Mexican aggression. (Thank you, President Polk!)
Signing the Compromise of 1850, allowing southern slavehunters to drag escaped slaves back south into lifelong bondage and servitude. (Thank you, President Fillmore!)
The Kansas Nebraska Act, abolishing the Missouri Compromise Line and allowing slavery to exist in any territory that wanted it. (Thank you, President Pierce!)
Allowing seven states to secede from the Union with complete inaction and leaving it as a problem for his successor. (Thank you, President Buchanan!)
Trying to undermine Reconstruction and sabotaging Congress' efforts to grant rights to freedmen. (Thank you, President Johnson!)
The sheer scope of felonious and unethical activity the Harding Administration managed to get through in 2 and a half years (Trump's gunning for Harding's record, no doubt).
Inaction and apathy in the face of the gravest and greatest economic disaster in human history. (Herbert Hoover)
Launching an illegal war in Cambodia without Congressional approval or even knowledge that ended up leading to the deaths of literally millions of people. (Thank you, Richard Nixon!)
Illegally running guns to the Iranian revolutionary government to pay for illegally funding Nicaraguan death squads directly counter to Congress. (Thank you, Ronald Reagan!)
Launching a brutal war under false pretenses that destabilizes the Middle East to this day, a war of which we are still dealing with the consequences. (Thank you, George W. Bush!)
Let's keep some perspective here when we say that Trump is the worst, OK?
You literally did not mention the interment of an entire race of people, or the dozens upon dozens of horrible, horrible things Lyndon Johnson did.
