Most normal jobs don’t come with the expectation that you can abuse those serving you. Try it with your mechanic and tell me how long he puts up with it.
Our local service department has customer service reps on staff to take the abuse—the mechanics get left alone.
Been on welfare all your life or just have rich parents?
Try it with your mechanic and tell me how long he puts up with it.
The owner of the shop may allow you to call the mechanic a lying thief, especially if they are.
It all depends on the owner just as it does at any job. But if you think there is any job on planet earth where you are always petted and praised boy, do I have some bad news for you.