When the Trump administration arrived in 2017 there was a task force with virus epidemic systems spelled out. A playbook on how to deal with the type of situation that happened a few years later. The Trump folks tossed it out-like so many things they trashed purely because it as a product of the Obama people.
That was bad enough, but as others have mentioned, the focus during Trump’s time in office was keeping the stock market high, not containing the virus spread. Yes, the vaccines were developed quickly by scientists, but at the same time Trump himself was saying really stupid shit about bleach and hydroxycloroquine and bright lights. Always downplaying the dangers- We’ll be done by Easter, or we’ll be rockin’ by July.
Biden has made mistakes, but he has been in the position of cleaning up a massive mess that Trump made worse in many ways. The vax skepticism has cost tens of thousands or more lives in the US and Trump failed miserably in terms of advocating for it. He strives on creating chaos and could have used his influence in a positive way. He did the opposite.