Edit: That struck a chord with millenials, ha! Tell your friends that bitching does not help, voting does. Boomers seem to understand this and so they have a disproportionate amount of influence. You want it to stop? VOTE.
2018 was the first election where Gen X and younger together outvoted Boomers and older.
There is, still, a statistical bump in the boomers, hence the baby boom.
There is just more of them, and they vote. They've only just started dying in big numbers.
Plus the older voters get the more they tend to vote, for various reasons.