Meanings of much put-upon in English

This much put-upon group of junior doctors are, in theory, undergoing training.

The nurse in charge was in uniform, the governess was a much put-upon person.

Yes, a sense that this was an honourable, righteous man, fighting the good fight for the oppressed, but slightly preposterous and always much put-upon.

There are many important and positive elements to the report which will be greatly appreciated by the frustrated and much put-upon travelling public in Dublin.