It matters not that this guy didn't make it onto a Federal bench. The damage has been done. Trump has filled the judicary with baby Clarance Thomases for decades. They are all under-qualified and are also religious zealots who pick-up caes already knowing how they will vote.
The charge of Liberal judges "legislating from the bench" is just projection. It is the right wing judges who have been biased, voting with their ideoology rather than on the merits of the case. The right wing members of the court have been nakedly partisan since the appointmet of Scalia in 1986 and Bush v. Gore in 2000. It's only gotten worse since.
Trump's legacy is three-fold. First, as detailed above, he has made the judiciary biased and under-qualified for decades. Second, he, his White House staff, and his appointments have all had a severe and alarming lack of experience. And third, he has brought his naked and highly amplifed ego into the executive branch. Our standards of how a US president should act and communicate have been forever changed.