Very easily. I just don't type anything. More to the point, I don't look it up before the match. I go into every match exactly the same way. I'm playing it to win, regardless of how my team does. It does not matter to me what the win rates of my teammates are, nor does it matter to me what the win rates of my opponents are.
I'm not going to play any differently against a 20% win rate opponent than I would an 80% win rate opponent. Nor am I going to play any differently with a 20% win rate teammate than I would with an 80% win rate teammate. In none of those situations is it considered wise to slack off; not if you think you've got a stellar teammate who is sure to carry you, not if you've got an unskilled opponent that you should be able to walk all over. What if your teammate was boosted to that win rate? What if your opponent decides to suddenly get boosted? If you aren't playing at your best, and you slack off, you could easily throw the match if you change your tactics based on what the numbers imply. But if you go into the match, and play it exactly the same as you always do, then at least you will be prepared to react to any changes that happen in the match in real time.
If I go into a match and I have a guy who is doing poorly, it's not my job to point out his shitty win rate. It's my job to try and carry the match in spite of his shitty win rate. Pointing it out just makes my job that much harder.