https://www.census.gov/data/tables/time-series/demo/voting-and-registration/p20-370.html
https://ropercenter.cornell.edu/how-groups-voted-1980
Boomers weren't the ones who elected Reagan, they were at most 35 at the time.
That's the president that started to fuck things up and it was just the same as usual, older people being more conservative, younger people not showing up to vote.