Look at any city blighted by deindustrialisation and subsequent population loss - you get whole neighbourhoods boarded up and abandoned because they’re surplus to requirements. Such a random loss as in this would cause that basically everyone. You’d also have pretty widespread system collapse - everything about our lives is dependent on complex systems of other people doing the right things at the right point in time. You know half those people out, the whole thing falls apart.
But I think it’s clear that not everywhere is like that - Tokyo looked normal, the park Scott visits in San Fran is well-looked after. Rhodey talks about the police in Mexico finding Clint’s victims, which suggests some places have recovered.
And they were? That character played by one of the directors talks about going on a date! But they’ve also still likely all suffered some kind of loss, in a completely unexpected and unimaginable way, so I think you can let them off for still struggling a bit 
