First of all, my criticisms are not limited to the manager's use of the bullpen.
Second, whether a bullpen is good, bad or in between, a good manager will get more out of his group than a bad manager would get. A good manager maximizes the outcome of the squad he is given. No one is arguing that a good manager could take the 1962 Mets to the World Series, but you just can't grasp the fact that there are good managers and bad managers regardless of the quality of their squads.
Farrell is not a top manager. He falls between average and below average.