I blame them. I see people doing literal shit jobs (cleaning bathrooms) every day for shittier pay and they even have a smile in their faces from time to time. They definitely don’t go out of their way to be assholes to everyone around them and spread their misery.
It’s an organization culture thing. I’ve been to airports where they just do their jobs, and I’ve been to ones where they think they’re cops and act accordingly: as bastards.