The inflation rate fell significantly under his presidency, but during periods of high inflation prices soared. Coming back from that after generations of extremely low inflation would have been tough for someone without failing facilities. I think a great politician could have weathered that storm, Biden wasn’t up to the task and Kamala’s messaging didn’t help.
Republicans getting out ahead on that inflation messaging similarly did wonders for Trump and other Republicans. Planting the idea that America somehow didn’t do well when we did far better than the rest of the world was brilliantly executed IMO.