From the Buzzfeed article:
The morning after Election Day, Trump declared that he would take the election to the Supreme Court, invoking the image of another Bush v. Gore, when the justices halted a ballot recount in Florida that handed the 2000 election to former president George W. Bush. Two weeks later, the legal landscape does not look at all like 2000. Trump would have to find legal paths to flip multiple states that Biden won, and the only case pending before the Supreme Court involves the fate of the 10,000 absentee ballots that arrived in Pennsylvania after Election Day.
This has always been his endgame, his 'Hail Mary' play. He's absolutely sure that if he can get a case to the SCOTUS that they'll rule in his favour and toss out the complete election result because he 'has' three justices who 'owe him big time'. All he knows is quid pro quo and he confidently expects those justices to play it his way. TBH, I'm not so sure they would. They know he's yesterday's news even if he doesn't.
I'm not a lawyer, but his expectation that SCOTUS could toss out the complete election result on the basis of some flimsy lawsuit filed based on some narrow issue shows how stupid he really is.