Depends on your positioning, your role, your hero etc. If you play mind games with heroes like genji, it is fair for both of you because this comes down to skill. If you flank the widow and bash her head in with heroes like doomfist and reaper, it’s unfair for widow. If widow catches you in the open when you are playing heroes like mccree or genji when there’s no environmental objects to take advantage of, it’s unfair for you.