Jokes aside--Mei's biggest counter is map rotations and acceptance. When you approach the objective and scout that the Mei is playing directly in front of the choke point, ask yourself; can you approach from a different angle? The idea is that pushing through the choke will result in the Mei Ice Walling you and separating you from your team. However, if you spot the Mei waiting for you and you reposition and approach from an off angle, it makes it significantly more difficult to wall you out. Now, another thing you could try is "accepting" that the Mei might just wall you out. So picking more vertically mobile heroes will give you the ability to dodge at least some of Mei's Ice Walls. Mei can't be overlooked when listing the most UN-FUN heroes in Overwatch 2. If you're looking for something more direct to counter Mei, here are some of our hero recommendations.
A player suggested we rework Cassidy’s Magnetic Grenade to find Mei anywhere on the map and immediately eliminate her 💀Obviously, we won’t be implementing this suggestion… but we couldn’t help but test it out to see what it looks like 😭 pic.twitter.com/uxLtvHYt1I — Overwatch (@PlayOverwatch) February 24, 2023