Well to a small brained north american yes i said you arent good since you are not diamond 100%
but in reality what I said was since you are around gold and plat elo the players wont actually know how to play him. Do you know what examples are? I guess i have to keep going since you are incompetent. Diamonds wont be able to play lee sin either unless you are around diamond 3 where players show they actually know a thing or two about the game and even then they probably still suck. Id say a master tier to high diamond 1 should actually be able to play lee sin good enough to make it actually impact your game as hard as it truly can. Therefore it doesnt matter if hes retarded broken.
Its like weight in bows and arrows. It doesn't matter if the 50 pound bow is better than the 20 pound bow if you cant even pull back the string.