A true critic ought to dwell upon excellencies rather than imperfections, to discover the concealed beauties of a writer, and communicate to the world such things as are worth their observation.
I think if you've been invited to someone's house, you eat what they serve you. Even if you leave hungry, you be gracious enough to eat what they've prepared.
Regret for the things we did can be tempered by time; it is regret for the things we did not do that is inconsolable.