It's harsh and it's sad, but is it really all that much worse than the many tens of thousands of years where humans lived in small tribes, sometimes in harsh ecosystems, with disease and pain and local conflict?
For the vast majority of our history, humans have lived far worse off than now. Sure, it's easy to tell yourself they were happy living in a simpler time in and some cases a tropical paradise, but losing most your siblings in early childhood and passing away yourself at the old age of 32 because you scraped your leg and tf got infected doesn't sound all that great to me.
That said, people of the past probably were happy. Happiness at your condition and situation seems to be highly relative. To us, it looks like a horrible punishment, but to them, it's just life, and losing your friends and family to illness and accident was likely as accepted as the fact today that you'll at some point die of old age.