What would you call it? Broadly speaking, as a group most of them "got out of" the normal struggles that life normally throws at a young married couple on this earth. Having a small family of 3 or 4 children in public school is a WHOLE DIFFERENT ANIMAL than having a larger family and homeschooling them.
You focus too much on difficult aspects of a larger family when you use phrases like "cheated" or "got out of".
They also "missed out on" the joys of being surrounded by many, happy children. They, sadly, will never know the blessing of 20+ grandchildren. If you ask me, they were "cheated" by a society that told them there was a better way than letting God direct your family.
To me, that all goes without saying.
I'm strictly talking about the material "goods" of life: free time, material wealth, etc.
They made choices influenced by their generation.
I say the Baby Boomers "cheated" in the same way I say that some converts "cheated" by choosing a spouse before they converted to (traditional) Catholicism. But we should all recall my posts about this -- that you don't get something for nothing. Sure, when you choose from 1,000,000 rather than 1,000 you MIGHT get a prettier catch, but what if she believes in divorce or birth control?
Long story short, I don't envy any group that made ANY permanent life choices (choice of spouse, how many children they would have, etc.) before they were in full understanding of Catholic doctrine.
I consider the Faith and the sweet yoke of the Gospel to be a blessing, not a curse. Being "trad from birth" and having the Faith is the ultimate blessing.
The things God forbids He forbids for our own good.