If it's bad by one metric for one person but not-good for all other people in all other metrics, then overall I think it's fair to call it bad. You don't need t

If it's bad by one metric for one person but not-good for all other people in all other metrics, then overall I think it's fair to call it bad. You don't need to rigorously define bad to establish bad; a brief survey of common metrics and how something ranks is acceptable.