But it's not that bad!
Rome's collapse took around 100 years, from 376 - 476[1]. If you consider Byzantine as a continuation of Rome, the final collapse didn't happen until 1453 [2]. So it took a full 1077 years for Rome to fall.
Plenty of time for our lifetimes to pass in relative comfort. We're, what, 10 years, maybe 20 years, into the process of our civilization collapsing?
I think what we're mostly seeing that's giving us the fear of collapse is a slowing of rapid growth after WW2 [3]. We've lived our whole lives in a time of rapid economic growth. Just because that's regressing to the mean doesn't mean the ride's over.
[1] https://en.wikipedia.org/wiki/Fall_of_the_Western_Roman_Empi...
[2] https://www.history.com/topics/ancient-middle-east/byzantine...
[3] slowing growth after "catching up" from WW2 is the core thesis of Capital in the 21st Century