I think it would have crushed his political chances forever. His tariffs and money printing caused inflation but when it was about to kick in Covid hit and it had a strong deflationary effect cause of the lockdowns. Which delayed the inflation till after he was out of office. This then combined with the supply issues and price gauging (helped by Trump's deregulation) to push prices up massively within the first year of Biden taking over letting people associate the inflation with him.
Most people judge a president by the first year even though that's actually the least informative one. In a country as large as the US decisions take time to be felt so the first 2 years of a president's term really is the aftermath of their predecessor. It's also why Trump could be believed to have a strong economy since he could take credit for Obama's strong economic growth. I'm also pretty sure he will for the first 2 years of this term take credit for all the big projects that Biden has started. Taking credit for the work of others is something Trump has always done.