Life is relative. It's not an argument to say "yea but we're better than the Ancient Egyptians!" So what? That isn't meaningful.
Using World War 1 really tells. That was a century ago. No one is even alive from then anymore.
That doesn't mean that there aren't parties that are responsible for much of our current troubles - be it the state of the education/healthcare systems, the state of the housing market, the state of salaries/wages, environmental issues, human rights, as well as the ever growing trend of identity politics and a variety of other issues.
It is also not infeasible that these problems might have actionable solutions and that change for the better would actually be possible with lots of effort. Ergo, accepting things as they are because "it could be worse" isn't a valid stance that would motivate one for whatever actions are necessary to improve the world in whatever capacity possible - be it protests, exercising your rights to vote, or calling out problematic behavior.
The system works. (Maybe not as fast as we like sometimes, but it absolutely works.)
But we have it much easier than previous generations. We've got better health, wonderful technology, more information than ever before. There's less poverty and less disease. Less racism. More empathy.
Consider the folks who were around for WWI. It was followed by a flu outbreak, huge stock market crash, Great Depression, then WWWII and Korean conflict.
Life is hard. But we don't have it so bad.