Yet another person with a lack of understanding of why Trump won.
He got about the same amount of votes as in the last election. It's the Democrats that couldn't get people to vote for them.
What I think were the main causes are not dropping Biden sooner, failure at acknowledging his shortcomings, failure at taking a stance on Palestine and attempting to appease the right instead of their core voters.
None of these have much to do with zoomers.
EDIT: Compared to 2020, Republicans gained 3.08 million votes, while Democrats lost 6.27 million.