Actually, in truth, accomplished quite a bit.
He managed to renege on the Paris Accord and many other environmental regulations, sending us further into irreparable climate recklessness and giving support to the now-frequently burning west, with only 8 years left to meet our goal of cutting net emissions in half instead of 12. He managed to send Iran back into enemy status and a renewed threat, enough that Biden had to bomb people this week. He managed to give tax breaks to people who needed it the most, furthering the economic divide between the haves and everyone else, in addition to needlessly widening our national debt in the process. He managed to pardon several high profile criminals, including Stone, Flynn, and Mansfield, simply for no other reason than being his cronies. And in response to the worst pandemic in over a century, he managed to politicize mask wearing so that half the nation wouldn’t wear one, or even adhere to any doctors’ advice, including inoculation once it became available, sending our nation soaring above the rest of the world, including third world countries, in numbers of deaths. He managed to deepen the divide between the parties with his constant attacks, to the point where it is now a sin to even compromise with the other side. He managed to get impeached for breaking the law on election rules, something Nixon didn’t survive. He managed to fabricate an illusion of widespread voter fraud from before the election up to the point where several states are now creating voting laws that are geared towards silencing one side under the pretense of eliminating this fraud, and moving us towards non-democratic takeover of our elections - something only totalitarian pretend-democracies practice. He managed to get some Senators and many House members to vote against certifying a clear election result due to this pretend fraud. And, finally, he managed to stir up his base with this fabrication to the point where they violently attacked our Capitol in an attempted coup his last days in office, managing to get him impeached for an unprecedented second time.
Worst. President. In. History.