Temperamentally

The car engine coughed temperamentally before roaring into life.

The first [phase] calls for leaders impatient with the past, and temperamentally disposed to an irreverent break with tradition. They must be agitators who can fan the flames of discontent and gather forces with the strength to tear down the old.

Reggie was a “release” from Guiding Eyes; he kept leading his trainers into light poles, so he was deemed temperamentally unsuited to be a service dog.