Battleye is a company contracted to work on the anti-cheat for the Arma 2 engine. Its a job.
They will get it done, because thats what they are payed for.
Yeah OK...but they fail so easily and no, they don't "get it done".
TBH Bastian does the best he can and knowing what he has to deal with every day he in fact does fantastically well given the limited resources he has employed.
I give credit when it is due...period.