Okay, so don't nerf Yi because he stomps in low elo but sucks in high elo?

preforms around the same as low elo as high elo.

The difference is in low elo, zed players stomp because low elo doesn't understand what to do against him, while in high elo zed players stomp because they're actually good at zed and know how to play around their weaknesses (one won't repeatedly ult the guy who built hourglass/has an untargetability for example)

Yi doesn't preform any better because the skill ceiling for him isn't that high, the only thing is yi mains in high elo have better game knowledge to play around timing when they want to do stuff, but even then he's severely outclassed.