come to kit pvp and put me in a corner and try to swing as fast as he was you'll see what i meant.

It is possible to hit that fast.
You can either have really fast fingers or you can use a specialized gaming mouse that increases the number of clicks. I saw how many times he hit you and it was about 3.

he didn't even look at me while hitting me replay the video few times u can tell he was using something

Fine, I will do so.
But I have to go to work now so I'm only going to be on my phone.

minecraft has a set limit of how fast u can swing and if he was using his mouse to help him then its unfair as well as not everyone has the same mouse and he gets the advantage