Pretty sure throughout history most (if not all) generations have worked to give their kids a better (if not approximately equal) quality of life to their own. That isn’t feasible for many people, and older generations are frustrated that it wasn’t/isn’t feasible for many who are currently young adults. That, along with the ability to control if you have kids, makes the choice for many of us. Why would you choose to have kids if their lives are worse than your own and you don’t enjoy your own?