What Presidency were you watching?
Trump failed utterly in responding to our worst racial crisis & division since the '60's. Trump destroyed America's reputation around the world. Trump failed families at the border. How is the Middle East doing these days? He didn't replace Obamacare "quickly and easily," as he promised.
And man, did he fail with the biggest crisis of his Presidency: COVID. Daily mixed messages and sewing confusion. There was no leadership on masks or distancing, he was anti-testing (which is laughable during a pandemic), he had no economic plan to counter the adverse effects of the virus. He was an absolute mess, and the economy spiraled downward because of it.
He also did long-term damage to faith in our elections and to the very fabric of our nation.
Trump will go down as the worst President in our history. His action & inaction weren't things that had "little or no effect." He was a disaster. He didn't lose because people didn't like his personality - he lost because he had no qualifications for the job he was in, and failed.