Barry Diller witnessed a swift decline in Elon Musk's popularity since they shared a box at the US Open in September 2024.The public turned on Musk as his influence over the government grew, causing a major shift in perception.Diller advised Musk to address government waste with care rather than aggressive measures to avoid backlash.Musk faced protests and resistance after setting out to cut $2 trillion in government spending, leading to a change in public sentiment towards him.