He wasn't responsible for all of it. COVID supply chain disruption obviously played a huge part, but it's like everyone has forgotten that Trump also sent out a huge amount of money[1]. We can debate if that was the wrong/right move, but it's annoying when people blame Biden for the inflation that inevitably came once the economy turned back around. Trump has as much if not more responsibility depending on how you look at it. Meanwhile, the Fed under a Biden administration has seemingly engineered a soft landing.

Trump also pressed SA to cut oil production to help prop up gas prices in the US [2]. So when the economy turned demand surged back pushing prices higher.

[1] https://www.investopedia.com/coronavirus-aid-relief-and-econ...

[2] https://www.reuters.com/article/economy/special-report-trump...