Pain resistance mechanism
A pain resistance mechanism is when someone has been through so much hell that new problems just feel like a tiny annoyance. They’ve been through the fire and now they're just here for the smoke.
He got fired, divorced, and lost his keys, now he just walks into traffic.
She had her dog stolen, her plants died, and now she’s just mad at the internet.
He got hit by a car, got a tattoo, and now he’s just here for the snacks.