I fail to understand the humour here.
Is there some context required?

Have you ever waited in line for an order, with a ticket, and it seemed like you got skipped? I assume that was a coincidence, and probably your order just took a little longer, or the ticket numbers aren’t in order anyway. This comic jokes that it’s intentional to spite you.

Weird for that to happen. But it makes sense now.
I can count with my hands, the number of times I’ve had to take a coupon and wait.
Guess it would have been funnier had that actually have happened to me before.

Almost any non-chain burger joint operates with numbers.

This is highly region-specific