Machines can't feel emotion, but if they could, this is probably the one they would feel the most.
A factory conveyor belt, performing the same mindless job, day in, day out, until a breakdown occurs.
A laptop, built to go obsolete by the time it hits the market so anyone who buys one immediately wants another instead.
(Plus the larger prospect of being owned and forced to do the master's bidding.)
A calculator, undergoing the sexual harrassment of constantly being made to say "BOOBLESS" upside-down.
An alarm clock, forced to have Tourette's every nine minutes until beaten back into silence.
And countless other examples.
Well, countless only until a sad machine is programmed to do the counting for us.
(See also Calculatorture and C3PO'd.)