glutton for punishment
One who persists in an effort in spite of harmful or unpleasant results.
I should have quit this job long ago, but I guess I'm just a glutton for punishment.
noun
The act (action) or process of punishing, imposing and/or applying a sanction, typically by an authority or a person in authority (for example: a parent or teacher), especially when disappointed or dissatisfied with the behavior or actions
The naughty children were given a punishment by their teachers.
A penalty to punish wrongdoing, especially for crime.
a light punishment
a harsh punishment
A suffering by pain or loss imposed as retribution.
Any harsh treatment or experience; rough handling.
a vehicle that can take a lot of punishment