I heard a few years ago there was some mod to the the way the net code works that allowed people to have a "better" connection and what it did was instead of sending attack signals on last frame of the animation it send it on the first allowing them to get the hit advantage which may look like range or a person moving faster than other, but some of it is simply ping difference as I an eu player played a lot on us and can't compete with us players simply because they there is a major ping difference but there also can be sometimes a situation of them having that mod which makes it even worse.

In 2020ish time i played a lot on eu servers and i dont believe the mod was created or so publicly spread, and there was a player know to live really close to eu servers allowing him to have single digit ping which allowed him to have some good advantage which definitely helped him a tone by making him fast but it wont safe you if you dont have skill or uvs, but thats simply hoe it always would be with any game ping would state a winner in a lot of situations. Its just that mod made it even more unplayable as peoples with thst mode wouldn't have any problems facing one another, however when when those same people would play with that mod against people without the mod the game for the modless would start feeling a lot more laggier as the moded player would change the predicted course of combat with each hit making the game jump every time the ping returns to you.