He hasnt though. There are no singular legislative victories during his administration. His wins have come with executive orders that are tied up in the courts or not actually actionable. And anything he HAS accomplished has been heavily divisive even amongst republicans. The next administration will reverse many of those, even a GOP administration.
His biggest accomplishment has been to weaken USs standing in the world. He has done Russias bidding.
Trump's only achievements so far have been to toss bombs into things. The man can't build a legit business, no surprise he can't build a list of real accomplishments.
I guess when all you've achieved in life is to fuck things up, then you see that as what an achievement is.