It’s literally his MO either through incompetence or hubris, he consistently plants landlines for both himself and others:

• Crash out of the JCPOA despite Iranian compliance and the EU trying to maintain the deal without the US, setting the stage for the current crisis
• Completely disregard the Palestinian question in the Abraham Accords, signaling to Hamas(/Iran) that the window is closing and soon the whole Gulf will be onboard with permanent Israeli domination of Palestine
• Give the Taliban whatever they want in the Doha Accords, but in a timeline that forces it to be the next President’s problem
• Publicly declare he’ll solve Ukraine-Russia in 100 days… signaling the limits of his patience, and that Putin only needs to delay, delay, delay
• “I’ll make a decision in two weeks on Iran”

He's playing checkers. They're playing Go