What other point in history was preferable everyone else, then?
Don't get me wrong, I think the baby boomers were incredibly selfish and self-indulgent as a 'group', but it's not like the world is a horrible place compared to any other point in time.
My dad had a 10th grade education and worked at a paper box factory and was able to be the sole provider in a family with four kids. They had a house, a cottage at the lake that they paid cash for, a car, and cable colour TV. Then the boomers came along and did even better. A kid graduating high school now faces a choice of either years of post-secondary school leading to extravagant student loan debt and iffy prospects afterward, or they can choose a lifetime of servitude in a low-paying job where they can barely support themself, nevermind a family. I think they would disagree that the world is just as good as it ever was.