From the article:
A 2022 study found that of the 57 justices who have sat on the court over the past century, the six justices with the most pro-business voting records are the six members of today’s 6-3, rightwing super-majority, all appointed by Republican presidents
What happened is that Biden and his team completely screwed up. They called for this debate and agreed to its terms, which included the fact that the moderator team would not be fact checking Trump in order to avoid accusations of bias.
These terms shifted the onus of calling Trump out on his biggest lies to Biden himself, who would have known that Trump would try to gish-gallop his way through the debate and avoid discussing policy because that's precisely what he did in 2020. The fact that Biden failed spectacularly to counter Trump in any meaningful way is the reason why he lost the debate.