As a US citizen, it is frustrating but not inexplicable.

The vast majority of the voters who had the opportunity, patience, ability, and inclination to follow an argument like this -- the inflation spike was global and the US did better than its peers -- voted for Harris.

Opportunity is a key part of the problem: many voters live in walled informational gardens guarded by propagandists. The only messages that can penetrate into the gardens are short, emotional rather than rational, and lacking in nuance. They are indistinguishable from the constant barrage of lies and disinformation these people are exposed to.