Obama fucked a lot of shit up...
But one thing he was willing to do, was tell Israel no.
It pissed Biden off so much, he publicly denounced Obama over it, because even till the day he left office from his first day as a Senator, Joe Biden always said: "The only way to negotiate with Israel, is give them everything they want"
That was his legitimate belief, so when Obama didn't say "yes", Biden shit talked him.
Even after he became president, Biden insisted you have to always say "yes" no matter what Israel asks:
Biden recounted in private that when he was vice president in 2014 and Israel mounted a military assault on Gaza, Obama and his staff rejected his belief, held for decades, that the best way to approach the Israelis is to hug them close but not criticize them, the people familiar with his comments said.
Instead, they said Biden has noted, Obama publicly admonished Israel’s actions and voiced concern for Palestinian civilian deaths early into the 2014 conflict. As a result, Biden has argued, Obama squandered any ability to influence the Israeli government as it invaded Gaza, said the people familiar with his comments.
The president’s private comparisons with his former boss subsided as outrage over rising civilian deaths in Gaza eclipsed the early praise for his approach, according to three of the people familiar with his comments. More than 14,000 Palestinians have been killed so far, according to the Hamas-controlled Gaza Health Department.
It's a very low bar, so while I am might have been the "best" in modern history, doesn't mean he was perfect or even better than El-Sayed or other new names.