At that point, aim to make them focus on you without dying. Even if you can’t get kills, if you can enable your team to get kills, you’ll still stand a chance. Use cover a lot heavier, and don’t be afraid to retreat a bit more. Something enemy teams will sometimes do is focus so hard on countering one character, that they forget to draft things to deal with the rest of your team. Of course, don’t force anyone to switch, especially since you aren’t switching to a better character matchup, but it could leave a nice opening for someone.