Unironically this. Dem are seen as the party that does almost nothing. They're the natural governing party, people who want change will punt for the outsider party, who says they'll break all the rule, because of how "unfair" the current system is.
At this point, it would probably be a good idea for the message to be something along the line of "we'll do medicare for all, and will impeach congressman/senate/judge who it".
But really, it came down to who was most affected by inflation and that was poor people, which means young people, so they voted against whoever was in governement at the time, and since most voter are uninformed, they didn't bother looking up what the word "tariff" means.