Only thing to counter hackers is to find out it early in the game, see if the banner have some numbers like 1000 headshots + 500 kills or something and/or if you see somone dominate in killfeed ungodly amount.
Then the best bet is to listen and see killfeed and try to know where he is at what times
When you are about to fight him, probably in the last top3 teams, find some place with lots of building or cover and try to out smart him with grenades and stuff.
Thats how it works in every game with cheaters, cheaters are terrible players, you just have to outsmart them.
Didn't know it was that simple. By golly folks. i think we've finally solved the age old dilemma of hackers. Just gotta outsmart em!
We also have to use our 6th sense or our own hacks to know where he is at what times. Because the killfeed definitely does not provide that info.