I wonder what Mohammed bin Salman knows about Biden? He clearly dislikes Biden, and indeed, Democrats seem to have tried to the US Federal Government to diminish or remove MBS from power
There's a whole lot more to the story of why MBS is aligning with Russia and China, away from the United States.
I think Biden was on the opposite side of Obama on just about every military/global issue. So my guess is that Biden was against giving them 1.7 billion in cash, probably because he wasn't getting a cut.
Biden made a big deal out of the Kashoggi murder and probably wanted MbS punished.