^^To add to what you are saying, the life expectancy in the US dropped down into the 40s during the Spanish Flu pandemic. Plenty of other valid reasons for why older generations had it way worse but this one particularly sticks out.
https://ourworldindata.org/spanish-f...mic-in-history
However, if you want to compare recent generations then I think there are plenty of arguments for why the millennials have had it worse than the boomers and gen x, but there's really no point in doing that since all of us have had soft, easy lives comparatively speaking.