Instructing is one thing. Some 'patter' or prompting and occasional instructor intervention is to be expected.
A competence check is an entirely different thing. Prior to any check there must be a thorough briefing, so that the pilot being checked knows exactly what is expected. Questions from both parties are in order, and need to be completed before flying.
A good check pilot will say very little during flight and do even less. Filtering out which mistakes are acceptable and which are not is the check pilot's responsibility, and normally covered in a thorough de-brief. If the check pilot takes control (other than perhaps to avoid something like an imminent collision) it would be normal to terminate the flight, go home and start again another day after some remedial training.
Being that this was a check merely to assess your competence and acceptability to hire their precious aeroplane, it seems that this instructor was either a bit scared of the machine, or you. If it was you, he should not have signed you out. If it was the aeroplane, under-confident instructors sometimes make unnecessary control inputs, or become 'screaming skulls'. Or he simply had no concept of CRM.