A summary of the thread:

Can anyone think of any other reason why Democrats lost [the working-class vote] in 2024?

Reasons with # recs:

Not Democrat policy related:
The opponent had the wrong skin color./The opponent had a vagina./Donald Trump promised and lied more./Half the country are idiots and believed him. (21)
54% of adults have a literacy level below the sixth-grade level, indicating that over half of the adult population struggles with more complex reading tasks (20)
People make mistakes, people believe lies, people get scammed... (18)
half the country is unable to reason properly and is driven instead by sheer emotion (14)
Politics is a team sport. An awful lot of people decide whether they're on Team Democrat or Team Republican and that's who they vote for. (5)
Maybe because they are sociopaths, who know they will profit from Trump's policies, and don't give a whit about the damage done to others by those same policies? (4)

Democrat policy related:
Rampant inflation/-Open borders/-Disastrous foreign policy/-Lying to the public about Biden’s mental fitness/-Choosing a terrible candidate (5)
Biden was unfavorable at the polls, and the open border plus sleepy Joe stuck. Biden was late on changing his policy at the border, and the disastrous debate led to Kamala (2)
when voters stated affordability was\is the biggest concern, are they still stupid or just liars? (1)