No one has to credit Trump for actually doing anything in particular. Rather, one has to look at where we are today compared to where we could be. Simply put, people are outraged at Trump. They claim he destroyed their lives and the country. That he was the most harmful thing that has ever happened. In the end, most have endured one of the most damaging world wide events, with minimal long term negative effects and many, if not most, are probably way ahead of where they were before his presidency.
To think that we could have gotten through COVID with no damage or ill effects is ridiculous. Could Trump have done better. Yes, and that is probably the biggest reason he was not elected. Could he have done worse. For me, I only have to look at what happened in during Obama's presidency and how the policies failed to protect anyone I knew, and actually directly destroyed many lives. Personally I permanently lost about 1/2 or more of my wealth under Obama and just about lost it all. If I had not been positioned just right, I would have. Yet, in the past 4 years, the half I was able to save has tripled or quadrupled. This past year has sucked, but not anywhere near what the 8 years under Obama did. I know he did not cause the crisis, but, in the end, he did very little to make it better for almost everyone I know.