Pain resistance mechanism
A pain resistance mechanism is when someone has been through so much garbage that new problems just slide off them like water off a duck’s back. They've seen it all and are ready to laugh in the face of disaster.
He lost his job, his car, and his dignity, now he's just mad at the coffee shop.
She was dumped, got a tattoo of her ex, and now she’s just happy the ex didn’t show up.
He got arrested, then got a promotion, now he’s just here for the snacks.